Number of 9-digit numbers whose sum of digits is n.

Terms

a(0) =1a(1) =9a(2) =45a(3) =165a(4) =495a(5) =1287a(6) =3003a(7) =6435a(8) =12870a(9) =24309a(10) =43741a(11) =75465a(12) =125445a(13) =201675a(14) =314523a(15) =477015a(16) =705012a(17) =1017225a(18) =1435005a(19) =1981845a(20) =2682559a(21) =3562131a(22) =4644255a(23) =5949615a(24) =7493982a(25) =9286233a(26) =11326425a(27) =13604085a(28) =16096905a(29) =18770031