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A269122
Number of sequences with n copies each of 1,2,3,4 avoiding the pattern 1234.
2
1, 23, 1879, 173891, 16140983, 1474050783, 132279480115, 11690616534627, 1020149742404727, 88094027572412735, 7541872062618216079, 641058122723345275763, 54163773797158984485203, 4553249681522845632696611, 381122944171897823109474291
OFFSET
0,2
LINKS
FORMULA
a(n) = A008977(n) - A268840(n).
CROSSREFS
Row n=4 of A269129.
Sequence in context: A326365 A319508 A331340 * A132395 A064016 A263462
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Feb 19 2016
STATUS
approved