30086
domain: N
Appears in sequences
- Expansion of 1/((1+x)*(1-x)^11).at n=8A001786
- Number of internal nodes of even outdegree in all ordered rooted trees with n edges.at n=9A014301
- Number of planar simply-connected polyhexes (or benzenoid hydrocarbons) with n hexagons.at n=9A018190
- a(n) = T(n, n+3), T given by A027052.at n=13A027054
- Starting positions of strings of three 8's in the decimal expansion of Pi.at n=27A083637
- Index of first occurrence of n-th prime in A001203, the continued fraction for Pi.at n=33A107892
- A tree-node counting triangle.at n=57A109244
- Number of 4 X n 0..1 arrays with rows unimodal and columns nondecreasing.at n=9A225011
- Maximum fixed points under iteration of sum of cubes of digits in base n.at n=34A226026
- Number of integer partitions of n whose multiplicities appear with distinct multiplicities.at n=45A325329
- Expansion of Product_{k>=1} (1 + x^sigma(k)) / (1 - x^sigma(k)).at n=36A333045