Numerator of b(n) given by b(1) = 1, b(2) = 2; for n >= 3, b(n) = (-1)^n (2n-1) ((n-2)!!)^2/((n-1)!!)^2, where n!! is the double factorial A006882.
A095159
Numerator of b(n) given by b(1) = 1, b(2) = 2; for n >= 3, b(n) = (-1)^n (2n-1) ((n-2)!!)^2/((n-1)!!)^2, where n!! is the double factorial A006882.
Terms
- a(0) =1a(1) =2a(2) =-5a(3) =28a(4) =-81a(5) =704a(6) =-325a(7) =768a(8) =-20825a(9) =311296a(10) =-83349a(11) =1507328a(12) =-1334025a(13) =3145728a(14) =-5337189a(15) =130023424a(16) =-1366504425a(17) =7516192768a(18) =-5466528925a(19) =12884901888a(20) =-87470372561a(22) =-349899121845
External references
- oeis: A095159