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A279295
Number of permutations of [n] having exactly six (possibly overlapping) doubledescents.
2
1, 16, 1138, 25999, 775195, 18523314, 463088628, 11068300437, 268537592975, 6514804501312, 160541447975710, 4013204668037233, 102267326625073183, 2658365720541599806, 70614284743773530148, 1917874812704472161265, 53294689741358893762638
OFFSET
8,2
LINKS
CROSSREFS
Column k=6 of A162975.
Sequence in context: A144915 A209541 A374493 * A353029 A053903 A254333
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Dec 09 2016
STATUS
approved