a(n) = 2^(-n)*Sum_{k=0..n} binomial(2*n+1, 2*k+1)*A000364(n-k).
A111196
a(n) = 2^(-n)*Sum_{k=0..n} binomial(2*n+1, 2*k+1)*A000364(n-k).
Terms
- a(0) =1a(1) =2a(2) =9a(3) =78a(4) =1141a(5) =25442a(6) =804309a(7) =34227438a(8) =1886573641a(9) =130746521282
External references
- oeis: A111196