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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A264877 Number of (n+1)X(7+1) arrays of permutations of 0..n*8+7 with each element having directed index change 0,1 0,-1 -2,0 or 1,1.

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%I A264877 #4 Nov 27 2015 07:33:48
%S A264877 1,49,1101,22152,356692,4747695,68488297,1050281271,16268725036,
%T A264877 247512489984,3713720283901,55663627322361,837518704332088,
%U A264877 12633257316861814,190523379365155077,2870374015520944177
%N A264877 Number of (n+1)X(7+1) arrays of permutations of 0..n*8+7 with each element having directed index change 0,1 0,-1 -2,0 or 1,1.
%C A264877 Column 7 of A264878.
%H A264877 R. H. Hardin, <a href="/A264877/b264877.txt">Table of n, a(n) for n = 1..95</a>
%e A264877 Some solutions for n=4
%e A264877 .16..2..1..4..5.21..7.23...16..2..3..4..5.21..7.23...16..0..3.19..5..6..7.23
%e A264877 ..9..0.11.10..3.29.15..6....9..0..1.27.11.14.15..6....9.10..1..2.11..4.15.31
%e A264877 .32..8.19.20.36.12.13.14...32..8.19.10.36.12.13.22...32..8.17.20.36.12.13.14
%e A264877 .25.26.17.18.27.30.31.22...25.26.17.18.29.20.31.30...25.26.27.18.29.28.21.22
%e A264877 .33.24.35.34.37.28.39.38...33.24.35.34.37.28.39.38...33.24.35.34.37.38.39.30
%Y A264877 Cf. A264878.
%K A264877 nonn
%O A264877 1,2
%A A264877 _R. H. Hardin_, Nov 27 2015