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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
OFFSET
7,9
LINKS
CROSSREFS
Column k=4 of A242783.
Sequence in context: A210683 A271111 A204415 * A205934 A375975 A231202
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Aug 19 2014
STATUS
approved