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 A202799 Number of nX5 binary arrays with every one adjacent to another one horizontally or vertically 1

%I

%S 12,454,11988,311144,8222576,217145076,5730640104,151245101550,

%T 3991784606164,105354316048660,2780593210008194,73387575404296206,

%U 1936901875857360748,51120219046394982056,1349204535780755578282

%N Number of nX5 binary arrays with every one adjacent to another one horizontally or vertically

%C Column 5 of A202802

%H R. H. Hardin, <a href="/A202799/b202799.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 27*a(n-1) -82*a(n-2) +1720*a(n-3) -876*a(n-4) +36142*a(n-5) +36267*a(n-6) +228084*a(n-7) +1329202*a(n-8) -3356034*a(n-9) -15601554*a(n-10) +6682402*a(n-11) +62222338*a(n-12) +8454105*a(n-13) -144765880*a(n-14) -62367040*a(n-15) +251331688*a(n-16) +212121408*a(n-17) -212078096*a(n-18) -315914880*a(n-19) -123060608*a(n-20) -12403456*a(n-21) +277981952*a(n-22) +391540736*a(n-23) +190742528*a(n-24) +156106752*a(n-25) +22544384*a(n-26) +16777216*a(n-27)

%e Some solutions for n=3

%e ..1..1..1..0..0....0..0..1..1..1....1..1..1..1..1....1..1..0..0..1

%e ..0..0..0..0..1....0..1..1..1..0....0..1..0..1..1....1..0..1..0..1

%e ..1..1..1..1..1....0..0..1..1..1....1..1..1..0..1....1..1..1..0..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 24 2011

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Last modified December 14 12:04 EST 2019. Contains 329979 sequences. (Running on oeis4.)