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A266737
Number of words on {1,1,1,2,2,2,3,3,3,4,4,4,...,n,n,n} avoiding the pattern 1234.
4
1, 1, 20, 1680, 173891, 21347262, 2977892253, 455912368540, 74876841353159, 12990339123973119, 2354973430941967605, 442587722191655715108, 85717352536181708342445, 17029266882947116165470103, 3457866959157770598680361537, 715559803849259851987691458500
OFFSET
0,3
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jan 06 2016
EXTENSIONS
More terms from Alois P. Heinz, Jan 14 2016
STATUS
approved