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A259740
Number of (n+2) X (6+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00010101 or 01010101.
1
152, 414, 1514, 4456, 12086, 36522, 110886, 321402, 940024, 2797222, 8258758, 24257464, 71561342, 211332750, 622843492, 1835798648, 5415224264, 15970038332, 47084802318, 138843880250, 409450822484, 1207369012134, 3560209628616
OFFSET
1,1
COMMENTS
Column 6 of A259742.
LINKS
FORMULA
Empirical: a(n) = a(n-1) +9*a(n-3) +18*a(n-4) +14*a(n-5) +19*a(n-6) -13*a(n-7) -67*a(n-8) -38*a(n-9) +19*a(n-10) +49*a(n-11) +50*a(n-12) -16*a(n-13) -41*a(n-14) -5*a(n-15) -a(n-16) -7*a(n-17) +3*a(n-18) +2*a(n-19) +a(n-20) for n>22.
EXAMPLE
Some solutions for n=4
..0..1..0..0..0..1..0..1....0..1..0..1..0..1..0..0....0..0..1..0..0..0..1..0
..1..0..1..0..1..0..1..0....1..0..0..0..1..0..1..0....0..1..0..1..0..1..0..1
..0..1..0..1..0..1..0..1....0..1..0..1..0..1..0..1....1..0..1..0..1..0..1..0
..1..0..1..0..1..0..0..0....1..0..1..0..1..0..1..0....0..1..0..1..0..1..0..1
..0..1..0..0..0..1..0..1....0..1..0..0..0..1..0..1....1..0..1..0..0..0..1..0
..0..0..1..0..1..0..1..0....1..0..1..0..1..0..0..0....0..1..0..1..0..1..0..1
CROSSREFS
Cf. A259742.
Sequence in context: A248816 A038857 A137632 * A253359 A226365 A085775
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 04 2015
STATUS
approved