Indices k where A057176(k) = 1.

Terms

a(0) =1a(1) =4a(2) =64a(3) =400a(4) =489a(5) =519a(6) =2164a(7) =3589a(8) =8703a(9) =84761a(10) =358837a(11) =1463825a(12) =1668392a(13) =20471837a(14) =31960443