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A260135 Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 01010101 or 01010111 1
472, 1626, 7698, 24696, 89000, 365308, 1340176, 4872072, 18722120, 70481648, 261099100, 983277524, 3703246800, 13842606580, 51913534988, 195076841960, 731304173564, 2741911934968, 10290873860440, 38603457828044 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A260138

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = a(n-1) +2*a(n-2) +33*a(n-3) +20*a(n-4) -18*a(n-5) -257*a(n-6) -260*a(n-7) -44*a(n-8) +912*a(n-9) +798*a(n-10) +241*a(n-11) -1094*a(n-12) -868*a(n-13) -450*a(n-14) +667*a(n-15) +251*a(n-16) +158*a(n-17) -247*a(n-18) -19*a(n-19) +25*a(n-20) +81*a(n-21) +7*a(n-22) -8*a(n-24) for n>25

EXAMPLE

Some solutions for n=4

..0..1..0..1..0..1..1....0..1..0..0..0..1..0....1..0..1..0..1..0..0

..1..0..1..0..1..0..1....1..0..1..0..1..0..1....0..1..0..1..0..0..0

..0..1..0..1..0..1..0....1..1..0..1..0..1..1....1..1..1..0..1..0..1

..1..0..1..1..1..0..1....1..0..1..0..1..0..1....0..1..0..1..0..1..0

..1..1..0..1..0..1..1....0..1..0..1..0..1..0....1..0..1..0..1..0..1

..1..0..1..0..1..0..1....1..0..1..1..1..0..0....0..0..0..1..0..1..1

CROSSREFS

Cf. A260138

Sequence in context: A345798 A235287 A260102 * A259640 A187161 A249534

Adjacent sequences:  A260132 A260133 A260134 * A260136 A260137 A260138

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 17 2015

STATUS

approved

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Last modified January 20 13:06 EST 2022. Contains 350472 sequences. (Running on oeis4.)