a(n) = Sum_{k=0..n} F(n+k)*binomial(n+k,k) where F=A000045.
A118726
a(n) = Sum_{k=0..n} F(n+k)*binomial(n+k,k) where F=A000045.
Terms
- a(0) =0a(1) =3a(2) =25a(3) =224a(4) =2073a(5) =19646a(6) =189267a(7) =1845115a(8) =18148809a(9) =179759988a(10) =1790426165a(11) =17914292003a(12) =179925732000
External references
- oeis: A118726