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R. H. Hardin, <a href="/A251289/b251289.txt">Table of n, a(n) for n = 1..210</a>

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Number of (n+1)X(5+1) 0..1 arrays with every 2X2 subblock having a single 1 or two 1s on the same edge or main diagonally

297, 2193, 12954, 94706, 577942, 4109933, 25654154, 178853600, 1134888362, 7800498387, 50090230067, 340784782367, 2207291572071, 14906727029792, 97157151617639, 652654217958931, 4273049848255227, 28593960218535652

1,1

Column 5 of A251292

Empirical: a(n) = 2*a(n-1) +88*a(n-2) -135*a(n-3) -2981*a(n-4) +3592*a(n-5) +53112*a(n-6) -48505*a(n-7) -569410*a(n-8) +364874*a(n-9) +3930122*a(n-10) -1540368*a(n-11) -17988232*a(n-12) +3272127*a(n-13) +55124431*a(n-14) -1161425*a(n-15) -113275406*a(n-16) -10826616*a(n-17) +154794982*a(n-18) +28341285*a(n-19) -137492855*a(n-20) -36207019*a(n-21) +76154295*a(n-22) +27994276*a(n-23) -24440737*a(n-24) -13266099*a(n-25) +3650459*a(n-26) +3432157*a(n-27) +109673*a(n-28) -359916*a(n-29) -80999*a(n-30) -2950*a(n-31) +430*a(n-32) +24*a(n-33) for n>34

Some solutions for n=4

..1..1..0..1..1..1....0..0..0..0..0..0....0..1..0..1..1..0....0..0..0..0..0..0

..0..0..0..0..0..0....1..1..1..1..0..1....0..0..0..0..0..0....0..1..0..1..0..1

..0..1..1..0..1..1....0..0..0..0..0..1....0..1..1..1..1..1....0..1..0..1..0..1

..0..0..0..0..0..0....1..1..1..1..0..0....0..0..0..0..0..0....0..0..0..0..0..0

..0..1..1..1..0..1....0..0..0..0..0..1....0..1..1..1..0..1....1..1..0..1..0..1

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nonn

R. H. Hardin, Dec 01 2014

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