cp's OEIS Frontend

A189649 Number of n X 8 array permutations with each element moving zero or one space horizontally, diagonally or antidiagonally.

%I A189649 #7 Jan 06 2024 21:42:15
%S A189649 34,127385,155610272,248034953713,376678790309002,579697460209171993,
%T A189649 890636373071604964608,1369385680210307625221600,
%U A189649 2105439181301591456075023034,3237297479202888870044365473801
%N A189649 Number of n X 8 array permutations with each element moving zero or one space horizontally, diagonally or antidiagonally.
%C A189649 Column 8 of A189650.
%H A189649 R. H. Hardin, <a href="/A189649/b189649.txt">Table of n, a(n) for n = 1..23</a>
%e A189649 Some solutions for 3 X 8
%e A189649 ..0..2..3..4.11..5..6..7....0..2..3.10..5..4..6..7....0..2..3..4..5.14.13..7
%e A189649 ..1..8.17.12.13.14.21.22....1..8.11.12.19.13.15.22....1..8.10.18.11..6.23.15
%e A189649 ..9.16.18.10.19.20.15.23....9.16.17.18.20.21.23.14....9.16.17.20.19.12.21.22
%Y A189649 Cf. A189650.
%K A189649 nonn
%O A189649 1,1
%A A189649 _R. H. Hardin_, Apr 24 2011