Squares whose sum of divisors is a square.

Terms

a(0) =1a(1) =81a(2) =400a(3) =32400a(4) =1705636a(5) =3648100a(6) =138156516a(7) =295496100a(8) =1055340196a(9) =1476326929a(10) =2263475776a(11) =2323432804a(12) =2592846400a(13) =2661528100a(14) =7036525456a(15) =10994571025a(16) =17604513124a(17) =39415749156a(18) =61436066769a(19) =85482555876a(20) =90526367376a(21) =97577515876a(22) =98551417041