A190947 - OEIS

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

%I #4 Mar 31 2012 12:36:20

%S 1,0,0,0,0,13002,11471355944,101716608710405424,

%T 18726065054096898027414348,96678228204760902484487394741989088

%N 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

%K nonn

%O 1,6

%A _R. H. Hardin_ May 24 2011