Number of nonnegative solutions of x1^2 + x2^2 + ... + x12^2 = n.

Terms

a(0) =1a(1) =12a(2) =66a(3) =220a(4) =507a(5) =924a(6) =1584a(7) =2772a(8) =4521a(9) =6436a(10) =8712a(11) =12552a(12) =18041a(13) =23364a(14) =28776a(15) =37896a(16) =50997a(17) =62832a(18) =72996a(19) =89892a(20) =115776a(21) =139348a(22) =156816a(23) =185064a(24) =231759a(25) =274044a(26) =300828a(27) =343564a(28) =418638a(29) =487080