cp's OEIS Frontend

A189655 Number of 7Xn array permutations with each element moving zero or one space horizontally, diagonally or antidiagonally.

%I A189655 #7 Jul 22 2025 11:52:24
%S A189655 1,6272,1180167,1598901325,1113666564608,1104421532180261,
%T A189655 958681588788944613,890636373071604964608,805563236027350658919747,
%U A189655 738517619493670317553084705,673437704833463142294374124032
%N A189655 Number of 7Xn array permutations with each element moving zero or one space horizontally, diagonally or antidiagonally.
%C A189655 Row 7 of A189650
%H A189655 R. H. Hardin, <a href="/A189655/b189655.txt">Table of n, a(n) for n = 1..65</a>
%e A189655 Some solutions for 7X3
%e A189655 ..0..1..2....0..1..2....0..1..2....0..1..2....0..1..2....0..1..2....0..1..2
%e A189655 ..3..6..5....4..6..5....3..5..4....3..6..5....3..4..5....3..6..5....4..3..5
%e A189655 ..4..8.10...10..3..7....6..9..8....7..8..4....7..6..8....4.11..8....6..8..7
%e A189655 ..9.11..7....9..8.11....7.11.10...10.11.13...10..9.11...13.12..7...10.12.11
%e A189655 .12.14.13...16.17.14...12.13.14...12..9.16...12.14.13...10..9.14...13..9.14
%e A189655 .16.15.17...13.12.19...16.17.19...15.14.19...19.15.17...15.17.16...16.20.17
%e A189655 .19.18.20...18.15.20...18.15.20...18.17.20...18.20.16...19.18.20...18.15.19
%K A189655 nonn
%O A189655 1,2
%A A189655 _R. H. Hardin_ Apr 24 2011