cp's OEIS Frontend

A264132 Number of (1+1)X(n+1) arrays of permutations of 0..n*2+1 with each element having index change +-(.,.) 0,0 0,2 or 1,2.

%I A264132 #6 Nov 10 2015 11:05:40
%S A264132 1,5,25,80,256,976,3721,13725,50625,189225,707281,2637376,9834496,
%T A264132 36706880,137007025,511286105,1908029761,7120920301,26575846441,
%U A264132 99181976400,370150560000,1381421480400,5155538077561,19240724018101
%N A264132 Number of (1+1)X(n+1) arrays of permutations of 0..n*2+1 with each element having index change +-(.,.) 0,0 0,2 or 1,2.
%C A264132 Row 1 of A264131.
%H A264132 R. H. Hardin, <a href="/A264132/b264132.txt">Table of n, a(n) for n = 1..210</a>
%F A264132 Empirical: a(n) = 4*a(n-1) -a(n-2) +15*a(n-4) -60*a(n-5) +15*a(n-6) -15*a(n-8) +60*a(n-9) -15*a(n-10) +a(n-12) -4*a(n-13) +a(n-14)
%e A264132 Some solutions for n=4
%e A264132 ..0..1..2..3..4....7..8..2..3..4....0..1..4..3..2....0..3..2..1..4
%e A264132 ..7..8..5..6..9....5..6..0..1..9....5..8..7..6..9....5..6..9..8..7
%Y A264132 Cf. A264131.
%K A264132 nonn
%O A264132 1,2
%A A264132 _R. H. Hardin_, Nov 03 2015