Number of nonnegative solutions to (x_1)^2 + (x_2)^2 + ... + (x_8)^2 <= n.

Terms

a(0) =1a(1) =9a(2) =37a(3) =93a(4) =171a(5) =283a(6) =479a(7) =767a(8) =1076a(9) =1420a(10) =1952a(11) =2688a(12) =3444a(13) =4228a(14) =5320a(15) =6776a(16) =8262a(17) =9662a(18) =11454a(19) =13918a(20) =16480a(21) =18832a(22) =21772a(23) =25644a(24) =29508a(25) =33044a(26) =37300a(27) =42732a(28) =48340a(29) =53556