Number of ways of writing n as the sum of 9 triangular numbers.

Terms

a(0) =1a(1) =9a(2) =36a(3) =93a(4) =198a(5) =378a(6) =633a(7) =990a(8) =1521a(9) =2173a(10) =2979a(11) =4113a(12) =5370a(13) =6858a(14) =8955a(15) =11055a(16) =13446a(17) =16830a(18) =20031a(19) =23724a(20) =28836a(21) =33381a(22) =38520a(23) =45729a(24) =52203a(25) =59121a(26) =68922a(27) =77461a(28) =86283a(29) =99747