Number of sets of exactly n positive integers <= n+9 having a square element sum.

Terms

a(0) =1a(1) =3a(2) =8a(3) =26a(4) =69a(5) =166a(6) =365a(7) =750a(8) =1446a(9) =2646a(10) =4645a(11) =7856a(12) =12852a(13) =20411a(14) =31626a(15) =47910a(16) =71022a(17) =103342a(18) =147982a(19) =208554a(20) =289572a(21) =397140a(22) =538319a(23) =720965a(24) =955716a(25) =1255661a(26) =1634233a(27) =2108003a(28) =2699453a(29) =3431884