First numbers that belong to both sets:
1,
4,
9,
36,
100,
400,
900,
3600,
10000,
14400,
40000,
90000,
360000,
810000,
1000000,
1040400,
1440000,
2822400,
4000000,
4410000,
9000000,
36000000,
39690000,
81000000,
100000000,
100400400,
104040000,
110250000,
144000000,
282240000,
400000000,
404010000,
441000000,
900000000,
3600000000,
3969000000,
8100000000,
10000000000,
10004000400,
10040040000,
10404000000,
11025000000,
14400000000,
28224000000,
40000000000,
40040010000,
40401000000,
44100000000.