Binomial coefficient C(n,40).

Terms

a(0) =1a(1) =41a(2) =861a(3) =12341a(4) =135751a(5) =1221759a(6) =9366819a(7) =62891499a(8) =377348994a(9) =2054455634a(10) =10272278170a(11) =47626016970a(12) =206379406870a(13) =841392966470