Rectified 8-simplex numbers: the coefficient of x^(2n-2) in (1+x+x^2+...+x^(n-1))^9.

Terms

a(0) =0a(1) =1a(2) =36a(3) =414a(4) =2598a(5) =11385a(6) =39303a(7) =114387a(8) =292743a(9) =677556a(10) =1446445a(11) =2889315a(12) =5459103a(13) =9838062a(14) =17022474a(15) =28428930a(16) =46025562a(17) =72491859a(18) =111410946a(19) =167498452a(20) =246872340a(21) =357368319a(22) =508905705a(23) =713908845a(24) =987789465a(25) =1349495550