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A264476 T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having directed index change 0,1 1,0 2,1 or -1,-1.

%I A264476 #9 Nov 15 2015 07:34:00
%S A264476 0,1,1,0,2,0,0,4,4,1,1,8,6,8,1,0,17,16,16,16,1,0,36,57,120,49,32,2,1,
%T A264476 76,160,456,456,124,64,2,0,160,484,2272,3540,2232,384,128,3,0,337,
%U A264476 1449,11044,28489,24773,10116,1041,256,4,1,710,4250,49200,215607,310748
%N A264476 T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having directed index change 0,1 1,0 2,1 or -1,-1.
%C A264476 Table starts
%C A264476 .0...1....0......0........1..........0............0..............1
%C A264476 .1...2....4......8.......17.........36...........76............160
%C A264476 .0...4....6.....16.......57........160..........484...........1449
%C A264476 .1...8...16....120......456.......2272........11044..........49200
%C A264476 .1..16...49....456.....3540......28489.......215607........1711113
%C A264476 .1..32..124...2232....24773.....310748......4039259.......50217832
%C A264476 .2..64..384..10116...174927....3842048.....74367790.....1462247321
%C A264476 .2.128.1041..45792..1262270...43644384...1358980008....44706530288
%C A264476 .3.256.2868.212112..8905776..505769648..25131223920..1299344783466
%C A264476 .4.512.8189.960336.63373156.5849013488.454913826610.38128043682868
%H A264476 R. H. Hardin, <a href="/A264476/b264476.txt">Table of n, a(n) for n = 1..220</a>
%F A264476 Empirical for column k:
%F A264476 k=1: a(n) = a(n-2) +a(n-3)
%F A264476 k=2: a(n) = 2*a(n-1)
%F A264476 k=3: [order 15]
%F A264476 k=4: a(n) = 18*a(n-2) +36*a(n-3) -45*a(n-4) -216*a(n-5) -243*a(n-6) for n>7
%F A264476 k=5: [order 84] for n>86
%F A264476 k=6: [order 36] for n>40
%F A264476 Empirical for row n:
%F A264476 n=1: a(n) = a(n-3)
%F A264476 n=2: a(n) = 2*a(n-1) +a(n-4)
%F A264476 n=3: [order 15]
%F A264476 n=4: [order 10] for n>11
%F A264476 n=5: [order 84]
%e A264476 Some solutions for n=4 k=4
%e A264476 ..6..0..1..9..3....6..0..1..2..3....6..7..8..9..3....6..7..8..2..3
%e A264476 .11..5..2..7..4...11.12.13.14..4....0..1..2.14..4....0..1.13.14..4
%e A264476 .16.10.18..8.13....5.10..7.19..9...16.10.11.19.13...16.17.11.12..9
%e A264476 .21.22.23.24.14...21.22.16.24..8...21..5.12.24.18...10..5.23.24.18
%e A264476 .15.20.17.12.19...15.20.17.18.23...15.20.17.22.23...15.20.21.22.19
%Y A264476 Column 1 is A000931(n+1).
%Y A264476 Column 2 is A000079(n-1).
%Y A264476 Row 2 is A008999(n-1).
%K A264476 nonn,tabl
%O A264476 1,5
%A A264476 _R. H. Hardin_, Nov 14 2015