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A261551 Number of (n+2)X(4+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00001011. 1
336, 484, 754, 769, 816, 1286, 1510, 1615, 2362, 3215, 3431, 4393, 7048, 7780, 8410, 13211, 16608, 17829, 24668, 36190, 39242, 46637, 73624, 86018, 93335, 138721, 186633, 201052, 260339, 393430, 441304, 504693, 773636, 962188, 1043739, 1459993 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A261553.
LINKS
FORMULA
Empirical: a(n) = 4*a(n-7) +4*a(n-10) +2*a(n-13) -3*a(n-14) -2*a(n-17) +a(n-20) -4*a(n-21) -4*a(n-23) -8*a(n-24) -a(n-26) -6*a(n-27) +3*a(n-28) +3*a(n-34) +2*a(n-35) +2*a(n-38) for n>44
EXAMPLE
Some solutions for n=4
..0..0..0..0..0..0....0..0..0..0..0..0....1..0..0..1..0..0....1..1..0..0..0..0
..0..1..0..0..0..1....0..0..1..0..0..1....0..0..0..0..0..0....0..0..0..0..0..1
..0..0..1..0..0..0....0..1..0..0..0..0....1..0..0..0..0..0....1..0..0..0..1..0
..0..0..0..0..0..1....0..0..0..0..0..0....0..1..0..0..1..0....0..1..0..0..0..1
..0..0..0..0..0..0....0..0..0..0..1..0....0..0..0..0..0..1....0..0..0..0..0..0
..0..0..1..0..1..1....1..0..0..1..0..1....0..0..0..0..0..1....0..0..0..0..1..1
CROSSREFS
Cf. A261553.
Sequence in context: A090487 A289220 A060664 * A247530 A064259 A181256
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 24 2015
STATUS
approved

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Last modified April 21 04:17 EDT 2024. Contains 371850 sequences. (Running on oeis4.)