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A224646
Number of (n+2)X5 0..1 matrices with each 3X3 subblock having the same population
1
3200, 5696, 10304, 19328, 44096, 103232, 250304, 672320, 1832000, 5072000, 14598464, 42259520, 123062720, 363331136, 1075129664, 3188732288, 9504804416, 28357861952, 84686143424, 253379455040, 758408705600, 2270956426880
OFFSET
1,1
COMMENTS
Column 3 of A224651
LINKS
FORMULA
Empirical: a(n) = 4*a(n-1) -3*a(n-2) +36*a(n-3) -144*a(n-4) +108*a(n-5) -503*a(n-6) +2012*a(n-7) -1509*a(n-8) +3480*a(n-9) -13920*a(n-10) +10440*a(n-11) -12564*a(n-12) +50256*a(n-13) -37692*a(n-14) +22464*a(n-15) -89856*a(n-16) +67392*a(n-17) -15552*a(n-18) +62208*a(n-19) -46656*a(n-20)
EXAMPLE
Some solutions for n=2
..0..0..1..1..0....1..1..0..0..1....1..1..1..1..1....0..1..1..0..1
..1..1..0..1..1....0..1..0..0..0....0..1..1..0..1....0..0..0..1..1
..1..0..0..0..0....0..0..1..1..1....1..0..0..1..0....1..1..1..0..0
..0..1..0..1..1....1..0..1..0..0....1..1..1..1..1....1..1..0..1..1
CROSSREFS
Sequence in context: A235562 A269114 A035896 * A231203 A035777 A108001
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 13 2013
STATUS
approved