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A268751
Number of sequences with n copies each of 1,2,...,n avoiding the pattern 12...n.
3
0, 0, 1, 374, 16140983, 173996758190594, 791857392420720220446647, 2285085934263252199073238394141449534, 5841526335200139692050292842849347521755651331941759, 17585875137049122003330684747231440185032966840579881629527695901745706
OFFSET
0,4
LINKS
FORMULA
a(n) = A034841(n) - A268485(n).
EXAMPLE
a(2) = 1: 2211.
a(3) = 374: 111333222, 113133222, 113313222, ..., 333221121, 333221211, 333222111.
CROSSREFS
Main diagonal of A269129.
Sequence in context: A364009 A093237 A269113 * A369663 A249550 A045200
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Feb 12 2016
STATUS
approved