|
%I #6 Dec 22 2021 18:03:10
%S 0,37,393,2736,37225,604916,7201068,81028312,992539392,12531858912,
%T 152233949504,1825908062080,22176607035392,270645955787776,
%U 3285536600205312,39798931437072384,482959453126127616
%N Number of (n+1) X (6+1) arrays of permutations of 0..n*7+6 with each element having directed index change -2,0 -1,0 0,-1 or 1,1.
%C Column 6 of A264628.
%H R. H. Hardin, <a href="/A264626/b264626.txt">Table of n, a(n) for n = 1..184</a>
%e Some solutions for n=4
%e ..1..2..3..4..5..6.20....7..2.16.10..5..6.13....1.15..9..4.11..6.13
%e ..8..0.16.11.12.13.27....8..0..1.11..3..4.27....8..0.16..2..3.19..5
%e .15..7.23..9.10.33.34...15.22.30..9.32.20.12...21..7.17.18.10.20.12
%e .28.14.30.31.17.18.19...28.14.24.25.17.18.19...28.14.24.31.32.27.34
%e .29.21.22.32.24.25.26...29.21.31.23.33.34.26...29.30.22.23.33.25.26
%Y Cf. A264628.
%K nonn
%O 1,2
%A _R. H. Hardin_, Nov 19 2015
| 