739512

Appears in sequences

• Triangle read by rows: T(n,k) is the number of permutations of [n] having k cycles with at least 3 alternating runs (it is assumed that the smallest element of a cycle is in the first position), 0<=k<=floor(n/4).at n=18A187250
• Number of permutations of [n] having no cycle with 3 or more alternating runs (it is assumed that the smallest element of a cycle is in the first position).at n=10A187251
• Triangle read by rows, arising in enumeration of permutations by cyclic valleys, cycles and fixed points.at n=21A216964
• Triangle read by rows, related to Bell numbers A000110: A216962 interlaced with A216964.at n=46A217204