|
%I #5 Mar 31 2012 12:36:52
%S 12,724,23436,702846,21649928,669872090,20696263392,639259508770,
%T 19746821708510,609991818060458,18842950812606880,582067589653914988,
%U 17980345177885556288,555421459716439841384,17157234238650483438818
%N Number of nX5 binary arrays with every one adjacent to another one horizontally, diagonally, antidiagonally or vertically
%C Column 5 of A202795
%H R. H. Hardin, <a href="/A202792/b202792.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 29*a(n-1) -5*a(n-2) +1820*a(n-3) +3756*a(n-4) +14798*a(n-5) +39177*a(n-6) -33008*a(n-7) -120144*a(n-8) -276809*a(n-9) -534984*a(n-10) +521787*a(n-11) +1495342*a(n-12) +136066*a(n-13) -826372*a(n-14) -258636*a(n-15) -55508*a(n-16) -65340*a(n-17) +26654*a(n-18) +9760*a(n-19) +1452*a(n-20) +3060*a(n-21)
%e Some solutions for n=3
%e ..1..1..1..0..0....0..1..1..1..0....0..0..0..0..1....0..0..1..0..1
%e ..1..1..1..1..1....0..1..0..0..1....0..1..0..0..1....1..0..0..1..0
%e ..1..1..0..1..1....0..0..0..1..1....1..1..1..0..0....1..0..0..0..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Dec 24 2011
| 