A246223 Number of permutations of [n] with exactly three (possibly overlapping) occurrences of the consecutive step pattern given by the binary expansion of n, where 1=up and 0=down.
12, 0, 0, 158720, 74601, 0, 59062275, 17730048, 2099186631, 10006375, 206421198786, 135518026916798, 569885619485772, 13007265031125000, 5556193492800826418, 52483739349674666340, 51836903694327604380, 388109358965377200000, 302747316148839193725590
Offset: 7
Keywords
Links
- Alois P. Heinz, Table of n, a(n) for n = 7..130
Crossrefs
Column k=3 of A242783.