(Terms in A014733)/4.

Terms

a(0) =4a(1) =169a(2) =1089a(3) =169a(4) =22801a(5) =22801a(6) =3600a(7) =1459264a(8) =3600a(9) =63001a(10) =53348416a(11) =1946309689a(12) =6098829025a(13) =1946309689a(14) =53348416a(15) =63001a(16) =572166400a(17) =51799939216a(18) =429256901329a(19) =429256901329a(20) =51799939216a(21) =572166400a(22) =1036324