177661

Appears in sequences

• Certain subgraphs of a directed graph (inverse binomial transform of A005321).at n=6A005327
• a(n) = n^4 + 2*n^3 + 4*n^2 + 3*n + 1 = ((n+1)^5+n^5) / (2*n+1).at n=20A072025
• Number of 3 X 3 X 3 triangular nonnegative integer arrays with all sums of an element and its neighbors <= n.at n=18A166189
• (1, 1, 2, 3, 5, 7, 11, ...) convolved with (1, 0, 1, 2, 3, 5, 7, 11, ...); given A000041 = (1, 1, 2, 3, 5, 7, ...).at n=27A179906
• Number of bi-indecomposable topologies on n labeled points.at n=5A247660
• Triangle read by rows: coefficients eta(n,k) arising from the study of completely transitive graphs on n nodes.at n=21A259970
• Centered 10-gonal numbers which are sphenic numbers.at n=11A368426