A204521(n)^2 = floor[A055812(n)/5]: Squares which written in base 5, with some digit appended, yield another square.

A203719

A204521(n)^2 = floor[A055812(n)/5]: Squares which written in base 5, with some digit appended, yield another square.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =1a(4) =9a(5) =16a(6) =64a(7) =441a(8) =3025a(9) =5184a(10) =20736a(11) =142129a(12) =974169a(13) =1669264a(14) =6677056a(15) =45765225a(16) =313679521a(17) =537497856a(18) =2149991424a(19) =14736260449a(20) =101003831721a(21) =173072640400a(22) =692290561600

External references