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A246222 Number of permutations of [n] with exactly two (possibly overlapping) occurrences of the consecutive step pattern given by the binary expansion of n, where 1=up and 0=down. 2
99, 0, 13303, 530432, 2715243, 14872704, 712988175, 2114735616, 14553496947, 22338508875, 9307563626682, 839345640802598, 8486108520773778, 298020352385025000, 10432593658200450596, 210875469472380711300, 944599826416703171100, 12667164470975664000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

7,1

LINKS

Alois P. Heinz, Table of n, a(n) for n = 7..130

CROSSREFS

Column k=2 of A242783.

Sequence in context: A097601 A113602 A097846 * A304140 A305046 A316732

Adjacent sequences:  A246219 A246220 A246221 * A246223 A246224 A246225

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Aug 19 2014

STATUS

approved

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Last modified July 18 07:10 EDT 2019. Contains 325134 sequences. (Running on oeis4.)