27085

Appears in sequences

• a(n+1) = Sum_{k = 0..floor(2*n/3)} a(k)*a(n-k) for n >= 0 with a(0) = 1.at n=15A030033
• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 11.at n=28A031599
• Triangle read by rows: T(n,k) (n>=1, 0<=k<n) is the number of permutations of n with maximal difference k between elements in the same cycle.at n=49A263757
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 313", based on the 5-celled von Neumann neighborhood.at n=33A271202
• Number T(n,k) of entries in the k-th blocks of all set partitions of [n] when blocks are ordered by increasing lengths (and increasing smallest elements); triangle T(n,k), n>=1, 1<=k<=n, read by rows.at n=40A319298
• Number of entries in the fifth blocks of all set partitions of [n] when blocks are ordered by increasing lengths.at n=4A332945