A100256 Squares of second pentagonal numbers: (1/4) n^2(3n+1)^2.

0, 4, 49, 225, 676, 1600, 3249, 5929, 10000, 15876, 24025, 34969, 49284, 67600, 90601, 119025, 153664, 195364, 245025, 303601, 372100, 451584, 543169, 648025, 767376, 902500, 1054729, 1225449, 1416100, 1628176, 1863225, 2122849