a(n) = 1 + Sum_{m >= 1} (m + 1)^n/2^(m - 1).
A299404
a(n) = 1 + Sum_{m >= 1} (m + 1)^n/2^(m - 1).
Terms
- a(0) =3a(1) =7a(2) =23a(3) =103a(4) =599a(5) =4327a(6) =37463a(7) =378343a(8) =4366679a(9) =56698087a(10) =817980503a(11) =12981060583a(12) =224732540759
External references
- oeis: A299404