40116599
domain: N
Appears in sequences
- Euler characteristics of polytopes.at n=28A006482
- Central binomial coefficient - 1.at n=28A014495
- Number of combinations of n things from 1 to n at a time, with repeats allowed.at n=13A030662
- Number of 2n-bead balanced binary necklaces of fundamental period 2n equivalent to reverse.at n=29A045680
- a(n) = binomial(2*n-2, n-1) + (-1)^n.at n=14A286033