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A266738
Number of words on {1,1,1,2,2,2,3,3,3,4,4,4,...,n,n,n} avoiding the pattern 12345.
0
1, 1, 20, 1680, 369600, 117392909, 46121962742, 21198300356500, 11003612776114008, 6290031043253973544, 3887357166155963541538, 2562077915376091538040250, 1782153151031487742187453640, 1297781266782084301101836538690, 983066960483171632842827775906144
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