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A264321
Number of permutations of [n] with exactly two (possibly overlapping) occurrences of the consecutive pattern 3412.
2
1, 23, 379, 5706, 84354, 1266150, 19621124, 316459848, 5331647951, 93959680785, 1732274350449, 33392773007922, 672442070185276, 14130089667648160, 309458726679280550, 7054945428667834408, 167218369471952249237, 4115763361988379577315, 105071634182596234984655
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OFFSET
6,2
LINKS
Alois P. Heinz,
Table of n, a(n) for n = 6..200
EXAMPLE
a(6) = 1: 563412.
a(7) = 23: 1674523, 2674513, 3674512, 4673512, 5614723, 5624713, 5634127, 5634712, 5673412, 5714623, 5724613, 5734126, 5734612, 6573412, 6714523, 6724513, 6734125, 6734512, 6735124, 6745123, 6745132, 6745231, 7563412.
CROSSREFS
Column k=2 of
A264319
.
Sequence in context:
A018071
A016325
A016324
*
A285234
A046493
A014926
Adjacent sequences:
A264318
A264319
A264320
*
A264322
A264323
A264324
KEYWORD
nonn
AUTHOR
Alois P. Heinz
, Nov 11 2015
STATUS
approved
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Last modified June 8 03:28 EDT 2024. Contains 373207 sequences. (Running on oeis4.)
