a(n) = 3F0( -n,-n+1,-n+2;;-1)= n!*(n-1)!* 1F2(-n+2;2,3;-1)/2, where nFm(;;z) are generalized hypergeometric series.
A174315
a(n) = 3F0( -n,-n+1,-n+2;;-1)= n!*(n-1)!* 1F2(-n+2;2,3;-1)/2, where nFm(;;z) are generalized hypergeometric series.
Terms
- a(0) =1a(1) =7a(2) =97a(3) =2221a(4) =75721a(5) =3591211a(6) =225827617a(7) =18168156217
External references
- oeis: A174315