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A324132 Number of permutations of [n] that avoid the shuffle pattern s-k-t, where s = 1, t = 1234. 0
1, 1, 2, 6, 24, 120, 715, 4946, 38963, 344350 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..9.

S. Kitaev, Partially Ordered Generalized Patterns, Discrete Math. 298 (2005), no. 1-3, 212-229.

CROSSREFS

Cf. A000142.

Sequence in context: A324135 A177531 A121987 * A177524 A223905 A164872

Adjacent sequences:  A324129 A324130 A324131 * A324133 A324134 A324135

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Feb 16 2019

STATUS

approved

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Last modified September 16 10:46 EDT 2019. Contains 327094 sequences. (Running on oeis4.)