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A263819 Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having index change (+-,+-) 0,0 0,1 0,2 or 1,0.

%I A263819 #8 Jun 02 2025 12:15:15
%S A263819 121,11305,643905,31916832,1746531193,96761217077,5280184936704,
%T A263819 288410304823557,15799152314227457,865337374046219193,
%U A263819 47384715752967787849,2595217499912210034105,142150854161945612453920
%N A263819 Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having index change (+-,+-) 0,0 0,1 0,2 or 1,0.
%C A263819 Row 3 of A263816
%H A263819 R. H. Hardin, <a href="/A263819/b263819.txt">Table of n, a(n) for n = 1..78</a>
%e A263819 Some solutions for n=2
%e A263819 ..0..2..5....3..2..1....0..1..2....1..4..2....2..1..0....0..4..2....3..1..5
%e A263819 ..3..1..4....0..7..4....5..3..4....0..5..3....4..5..3....3..1..5....0..4..2
%e A263819 ..8.10..7....6..8..5....8..6..7....6..7..8....6..7..8....9..8..6....8..7..6
%e A263819 ..6.11..9...11..9.10...10.11..9....9.10.11....9.10.11...10..7.11....9.10.11
%Y A263819 Cf. A263816
%K A263819 nonn
%O A263819 1,1
%A A263819 _R. H. Hardin_, Oct 27 2015