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 A264382 Number of (4+1)X(n+1) arrays of permutations of 0..n*5+4 with each element having directed index change 2,-2 -1,0 -1,2 1,0 or 0,-1. 1

%I #4 Nov 12 2015 08:03:54

%S 0,25,441,3778,60858,711068,9407584,115929779,1485398475,18746069596,

%T 237937556367,3012183685044,38165904080061,483579364451792,

%U 6125734123144467,77617437527388938,983250878745280550

%N Number of (4+1)X(n+1) arrays of permutations of 0..n*5+4 with each element having directed index change 2,-2 -1,0 -1,2 1,0 or 0,-1.

%C Row 4 of A264379.

%H R. H. Hardin, <a href="/A264382/b264382.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A264382/a264382.txt">Empirical recurrence of order 81</a>

%F Empirical recurrence of order 81 (see link above)

%e Some solutions for n=4

%e ..1..6..5..8..9....1..2..7..6..9....5..6..7..8..9....1..6..3..4..7

%e ..0.11.12.13..4....0.11.10..3..4....0..1.10..3..4....0.11..2.13.14

%e ..2..3..7.18.17....5.16.15..8.17....2.12.15.18.17....5.12.15.18..9

%e .10.21.20.23.22...20.21.18.13.14...16.11.20.13.14...10..8.20.23.22

%e .15.16.14.24.19...12.22.23.24.19...21.22.23.24.19...21.16.17.24.19

%Y Cf. A264379.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 12 2015

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Last modified June 2 10:25 EDT 2023. Contains 363097 sequences. (Running on oeis4.)