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A190947 Number of permutations of the n*(n+1)/2 numbers (i copies of i | i=1..n), with no element equal to another within a distance of 3 0
1, 0, 0, 0, 0, 13002, 11471355944, 101716608710405424, 18726065054096898027414348, 96678228204760902484487394741989088 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

LINKS

Table of n, a(n) for n=1..10.

CROSSREFS

Sequence in context: A028385 A335742 A238142 * A203910 A138762 A139777

Adjacent sequences:  A190944 A190945 A190946 * A190948 A190949 A190950

KEYWORD

nonn

AUTHOR

R. H. Hardin May 24 2011

STATUS

approved

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Last modified May 7 15:02 EDT 2021. Contains 343650 sequences. (Running on oeis4.)