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Number of distinct even values of the (n-1)st difference of permutations of 1..n.
2

%I #6 Apr 16 2014 00:41:11

%S 0,1,11,5,63,23,355,269,1903,387,9281,1587,44457,94475,210337

%N Number of distinct even values of the (n-1)st difference of permutations of 1..n.

%Y Cf. A130803.

%K nonn

%O 2,3

%A _R. H. Hardin_, Mar 07 2010