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A224293
Number of permutations of length n containing exactly 1 occurrence of 1234 and 1 occurrence of 1243.
1
0, 0, 0, 0, 0, 2, 32, 322, 2634, 19216, 130662, 848284, 5334332, 32788726, 198201268, 1183152686, 6995479542, 41055940756, 239560353258, 1391435203864, 8052418072728, 46464481278410, 267483032264168, 1536914425518970, 8817393642571330
OFFSET
1,6
MAPLE
# Programs can be obtained from author's personal website.
CROSSREFS
Sequence in context: A212797 A203017 A079766 * A053065 A091707 A323639
KEYWORD
nonn
AUTHOR
Brian Nakamura, Apr 03 2013
STATUS
approved