42469
domain: N
Appears in sequences
- Number of tree-rooted planar maps with 4 vertices and n faces and no isthmuses.at n=4A006433
- Indices of primes in sequence defined by A(0) = 51, A(n) = 10*A(n-1) + 61 for n > 0.at n=17A101584
- p-INVERT of the positive integers, where p(S) = 1 - 3*S + 2*S^2.at n=7A291182
- p-INVERT of (0,1,0,1,0,1,...), where p(S) = 1 - S - 2 S^2 + 2 S^3.at n=15A291250
- Triangle read by rows: T(n,k) is the number of tree-rooted planar maps with n edges, k faces and no isthmuses, n >= 0, k = 1..n+1.at n=32A342987