Binomial coefficient C(45,n).

Terms

a(0) =1a(1) =45a(2) =990a(3) =14190a(4) =148995a(5) =1221759a(6) =8145060a(7) =45379620a(8) =215553195a(9) =886163135a(10) =3190187286a(11) =10150595910a(12) =28760021745a(13) =73006209045a(14) =166871334960a(15) =344867425584a(16) =646626422970