Binomial coefficient C(n,39).

Terms

a(0) =1a(1) =40a(2) =820a(3) =11480a(4) =123410a(5) =1086008a(6) =8145060a(7) =53524680a(8) =314457495a(9) =1677106640a(10) =8217822536a(11) =37353738800a(12) =158753389900a(13) =635013559600