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

Terms

a(0) =0a(1) =1a(2) =3a(3) =14a(4) =47a(5) =121a(6) =296a(7) =660a(8) =1358a(9) =2646a(10) =4905a(11) =8704a(12) =14887a(13) =24649a(14) =39651a(15) =62175a(16) =95286a(17) =143038a(18) =210732a(19) =305210a(20) =435195a(21) =611697a(22) =848494a(23) =1162662a(24) =1575195a(25) =2111713a(26) =2803273a(27) =3687272a(28) =4808464a(29) =6220104