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centered triangular n.  and  emirp

First numbers that belong to both sets:

31, 199, 9721, 10459, 10711, 36739, 114679, 142759, 156979, 176989, 178021, 182179, 193861, 312589, 322249, 323641, 352111, 778681, 913771, 1019701, 1067239, 1139269, 1216351, 1301539, 1358029, 1501501, 1571329, 1574401, 1620841, 1658479, 1671121, 1674289, 1760959, 1843159, 1869859, 1934041, 3039529, 3217141, 3426949, 3486151, 3559711, 7099201, 7369309, 7415929, 7523041, 7876459, 9140239, 9803539, 9980731, 10801759, 10963369, 11688709, 11755801, 12000619, 12128239, 12308041, 12402751, 12411379, 12584569, 12785221, 12793981, 13005121, 13280401, 13396699, 13540531, 13576609, 13857841, 14123539, 14224981, 14234221, 15364801, 15751261, 16538581, 16648339, 17539471, 18045739, 18076969, 18380251, 18464359, 18749641, 18919729, 19187029, 19391431, 19531909, 19662031, 30327769, 30489859, 30652381, 30693079, 32566411, 33467179, 33580639, 33865129, 33936439, 34150819, 34798009, 34899229, 36140059, 36538741, 37252909, 37492501, 37808131, 39007351, 39145159, 39637111, 71736211, 71756959, 72568471, 72651961, 73489501, 75434059, 76458691, 77145619, 78985189, 79486681, 90687601, 90897661, 91248301, 93035251, 93413659, 93982711, 96012001, 96204109, 97360789, 98500069, 99181939, 99401611, 99988591, 101463601, 101759899, 102056629, 103920979, 104220841, 104245849, 106635289, 107573239, 108668449, 109282141, 109307749, 109794871, 112480411, 114568291, 114594511, 115514101, 117523579, 117656389, 119255959, 119362981, 121189699, 122813029, 123901249, 124310569, 126092089, 126505009, 127194709, 127498771, 128191171, 128607511, 133005709, 134365141, 134791381, 137793961, 138831031, 139495639, 140422951, 140655259, 140684311, 141732181, 142871761, 145371271, 148697839, 151548979, 159150451, 159861979, 164604151, 164855659, 167793529, 168047461, 169288129, 170821369, 171590581, 173295379, 173521171, 176242141, 178591249, 179508991, 179804479, 184831651, 185464921, 186032449, 186266389, 190029421, 190063189, 190976059, 192366451, 192910411, 195641731, 198771949, 199878589.