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A204359
Number of (n+2)X8 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly one way, and new values 0..1 introduced in row major order
1
23912, 48226, 92286, 167480, 412860, 1006754, 2225410, 4825526, 10942334, 25492388, 58439276, 131852146, 298721620, 682683776, 1559009232, 3545167022, 8060117790, 18362399186, 41845749138, 95271124676, 216853176236
OFFSET
1,1
COMMENTS
Column 6 of A204361
LINKS
FORMULA
Empirical: a(n) = 3*a(n-1) -4*a(n-2) +5*a(n-3) +9*a(n-4) -31*a(n-5) +49*a(n-6) -59*a(n-7) +15*a(n-8) +54*a(n-9) -102*a(n-10) +110*a(n-11) -52*a(n-12) -25*a(n-13) +74*a(n-14) -77*a(n-15) +38*a(n-16) +2*a(n-17) -18*a(n-18) +17*a(n-19) -8*a(n-20) +a(n-21) for n>31
EXAMPLE
Some solutions for n=3
..0..1..0..1..1..1..0..1....0..1..0..1..1..0..0..0....0..1..0..0..0..0..1..1
..1..1..1..0..0..1..0..1....1..1..0..1..0..0..1..0....1..1..0..1..1..0..1..1
..1..0..1..1..0..0..1..1....0..1..1..0..0..1..0..1....0..1..1..0..1..1..0..0
..0..1..0..1..1..1..0..0....0..0..0..1..1..1..0..0....1..0..1..1..0..1..1..0
..0..1..1..0..1..0..1..0....1..0..1..0..1..0..0..1....0..1..0..1..1..0..1..1
CROSSREFS
Sequence in context: A185991 A251904 A239177 * A224620 A263156 A263153
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 14 2012
STATUS
approved