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A177314 Number of permutations of 9 copies of 1..n with all adjacent differences <= 2 in absolute value. 0

%I

%S 1,1,48620,227873431500,66341857216154520,10150867545062935511900

%N Number of permutations of 9 copies of 1..n with all adjacent differences <= 2 in absolute value.

%C a(n) = (9n)!/362880^n for n<=3.

%Y Cf. A172613.

%K nonn

%O 0,3

%A _R. H. Hardin_, May 06 2010

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Last modified September 26 09:15 EDT 2021. Contains 347664 sequences. (Running on oeis4.)