cp's OEIS Frontend

A189656 Number of 8 X n array permutations with each element moving zero or one space horizontally, diagonally or antidiagonally.

%I A189656 #7 Dec 26 2023 19:08:28
%S A189656 1,23409,9648721,39401919001,74192202677913,211788908613601649,
%T A189656 517069529154777840681,1369385680210307625221600,
%U A189656 3514075326766461571852637721,9167946522672764796730050799825
%N A189656 Number of 8 X n array permutations with each element moving zero or one space horizontally, diagonally or antidiagonally.
%C A189656 Row 8 of A189650.
%H A189656 R. H. Hardin, <a href="/A189656/b189656.txt">Table of n, a(n) for n = 1..17</a>
%e A189656 Some solutions for 8 X 3
%e A189656 ..0..1..2....0..1..2....0..1..2....0..1..2....0..1..2....0..1..2....0..1..2
%e A189656 ..4..3..5....4..3..5....4..3..5....4..3..5....4..3..5....4..3..5....4..3..5
%e A189656 ..6..8.10....6..8..7....7..6.10....7..6..8....7..6..8....6..8..7....6..8..7
%e A189656 ..7..9.11....9.11.10....9..8.11...13..9.11...10..9.11....9.14.10....9.11.13
%e A189656 .12.17.14...16.12.14...12.15.13...10.17.14...16.12.14...12.11.16...10.12.14
%e A189656 .15.18.13...15.20.13...19.14.17...15.12.19...15.18.13...13.20.17...15.16.17
%e A189656 .16.19.20...18.17.19...16.18.20...18.20.16...22.17.20...18.15.19...19.20.22
%e A189656 .22.21.23...22.21.23...21.23.22...22.21.23...21.23.19...21.22.23...21.18.23
%Y A189656 Cf. A189650.
%K A189656 nonn
%O A189656 1,2
%A A189656 _R. H. Hardin_, Apr 24 2011