Binomial coefficients C(2*n-8,9).

Terms

a(0) =10a(1) =220a(2) =2002a(3) =11440a(4) =48620a(5) =167960a(6) =497420a(7) =1307504a(8) =3124550a(9) =6906900a(10) =14307150a(11) =28048800a(12) =52451256a(13) =94143280a(14) =163011640a(15) =273438880a(16) =445891810a(17) =708930508a(18) =1101716330a(19) =1677106640a(20) =2505433700a(21) =3679075400a(22) =5317936260a(23) =7575968400a(24) =10648873950a(25) =14783142660