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A246224 Number of permutations of [n] with exactly four (possibly overlapping) occurrences of the consecutive step pattern given by the binary expansion of n, where 1=up and 0=down. 2
1, 0, 0, 0, 0, 0, 0, 0, 255577419, 0, 0, 9542007262728, 6774382288791, 0, 2426035607748545873, 7229099931331250350, 1033055991550105110, 2319374753629800000, 19452094129713604966805, 438500213962184713953125, 45449834784068599467011795 (list; graph; refs; listen; history; text; internal format)
OFFSET

7,9

LINKS

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

CROSSREFS

Column k=4 of A242783.

Sequence in context: A210683 A271111 A204415 * A205934 A231202 A226448

Adjacent sequences:  A246221 A246222 A246223 * A246225 A246226 A246227

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Aug 19 2014

STATUS

approved

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Last modified June 14 11:55 EDT 2021. Contains 345025 sequences. (Running on oeis4.)