a(n) = S(5,n)/S(1,n), where S(r,n) = Sum_{k = 0..floor(n/2)} ( binomial(n,k) - binomial(n,k-1) )^r.
A361888
a(n) = S(5,n)/S(1,n), where S(r,n) = Sum_{k = 0..floor(n/2)} ( binomial(n,k) - binomial(n,k-1) )^r.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =11a(4) =46a(5) =415a(6) =3265a(7) =30955a(8) =299500a(9) =3173626a(10) =33576266a(11) =386672861a(12) =4340714886a(13) =52846226091a(14) =620906440961
External references
- oeis: A361888