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A261707
Number of (n+2) X (4+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000001 00000101 or 00000111.
1
338, 462, 662, 675, 734, 1443, 1416, 1486, 2556, 3004, 3232, 4244, 7152, 6998, 7632, 14546, 15458, 16486, 25442, 35466, 36164, 44018, 77572, 78884, 85814, 147948, 177648, 185492, 258962, 398694, 405494, 472392, 818694, 898300, 962918, 1509474
OFFSET
1,1
COMMENTS
Column 4 of A261709.
LINKS
FORMULA
Empirical: a(n) = 3*a(n-7) +5*a(n-10) +a(n-13) -a(n-14) -a(n-17) -2*a(n-21) for n>27.
EXAMPLE
Some solutions for n=7
..0..0..0..0..1..0....0..1..0..1..0..0....0..1..0..0..0..0....1..0..0..0..0..1
..0..0..0..1..0..0....1..0..0..0..0..0....0..0..0..0..0..1....0..1..0..0..1..0
..1..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..1..0....1..0..0..0..0..0
..0..0..0..0..0..0....0..0..0..1..0..0....0..1..0..0..0..0....0..0..0..0..0..0
..0..0..0..1..0..0....0..0..1..0..0..0....1..0..0..0..0..0....0..0..0..1..0..0
..0..0..1..0..0..0....0..0..0..0..0..0....0..0..0..0..1..0....0..0..1..0..0..0
..0..0..0..0..0..0....0..0..0..0..0..1....1..0..0..1..0..0....0..0..0..0..0..0
..0..0..0..0..0..1....0..0..1..0..0..0....0..0..0..0..0..0....0..0..0..0..0..1
..0..1..0..0..1..0....0..1..0..0..0..1....0..0..0..0..0..0....1..0..1..0..1..0
CROSSREFS
Cf. A261709.
Sequence in context: A234625 A226539 A066478 * A202443 A188213 A250802
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 28 2015
STATUS
approved