Search a number
abundant n.  and  tetrahedral n.

First numbers that belong to both sets:

20, 56, 84, 120, 220, 364, 560, 680, 816, 1140, 1330, 1540, 2024, 2300, 2600, 3276, 3654, 4060, 4960, 5456, 5984, 7140, 7770, 8436, 9880, 10660, 11480, 13244, 14190, 15180, 17296, 18424, 19600, 22100, 24804, 27720, 29260, 30856, 34220, 37820, 41664, 43680, 45760, 50116, 54740, 59640, 62196, 64824, 70300, 73150, 76076, 82160, 85320, 88560, 95284, 98770, 102340, 109736, 117480, 125580, 142880, 147440, 152096, 161700, 166650, 171700, 182104, 187460, 192920, 204156, 209934, 215820, 227920, 234136, 240464, 253460, 260130, 266916, 280840, 287980, 295240, 325500, 341376, 349504, 357760, 374660, 392084, 400995, 410040, 419220, 428536, 447580, 457310, 467180, 487344, 497640, 508080, 529396, 551300, 573800, 585276, 596904, 608685, 620620, 632710, 669920, 682640, 695520, 721764, 735130, 748660, 776216, 790244, 804440, 833340, 848046, 893200, 908600, 924176, 955860, 971970, 988260, 1021384, 1038220, 1055240, 1089836, 1107414, 1125180, 1143135, 1161280, 1198144, 1235780, 1254890, 1274196, 1313400, 1333300, 1353400, 1394204, 1414910, 1435820, 1478256, 1499784, 1521520, 1565620, 1656360, 1679580, 1703016, 1750540, 1774630, 1798940, 1848224, 1873200, 1898400, 2001460, 2054360, 2081156, 2108184, 2162940, 2218636, 2275280, 2303960, 2332880, 2391444, 2421090, 2450980, 2511496, 2542124, 2573000, 2635500, 2667126, 2699004, 2763520, 2796160, 2829056, 2895620, 2929290, 2963220, 3031864, 3066580, 3101560, 3172316, 3244140, 3317040, 3353896, 3391024, 3466100, 3504050, 3619560, 3658620, 3697960, 3858140, 3939936, 3981264, 4022880, 4106980, 4192244, 4278680, 4322340, 4366296, 4455100, 4499950, 4545100, 4636304, 4682360, 4728720, 4822356, 4917220, 5013320, 5110664, 5209260, 5259030, 5410240, 5461280, 5512640, 5616324, 5668650, 5721300, 5881204, 5935160, 6044060, 6099006, 6154284, 6265840, 6322120, 6378736, 6492980, 6550610, 6608580, 6725544, 6784540, 6843880, 7084700, 7145775, 7207200, 7268976, 7331104, 7456420, 7519610, 7583156, 7711320, 7775940, 7840920, 7971964, 8038030, 8104460, 8238416, 8305944, 8373840, 8510740, 8649124, 8789000, 8859500, 8930376, 9073260, 9217660, 9363584, 9437120, 9511040, 9585345, 9660036, 9735114, 9810580, 9962680, 10039316, 10116344, 10271580, 10349790, 10428396, 10586800, 10666600, 10746800, 10989810, 11071620, 11153835, 11236456, 11319484, 11402920, 11571020, 11740764, 11912160.

Some larger examples :