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A261112 Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010001 00010101 or 01010101 1
547, 1546, 7284, 27030, 121313, 449132, 2037285, 7510472, 33972401, 125487988, 568045019, 2096976610, 9490614285, 35040037216, 158593916209, 585528496338, 2650104686942, 9784190038600, 44283559200132, 163495032625670 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A261113

LINKS

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

FORMULA

Empirical: a(n) = 9*a(n-2) +117*a(n-4) +232*a(n-6) -453*a(n-8) -2222*a(n-10) +4157*a(n-12) -4373*a(n-14) +31514*a(n-16) -108786*a(n-18) +199500*a(n-20) -228491*a(n-22) +167917*a(n-24) -76526*a(n-26) +21086*a(n-28) -3000*a(n-30) +634*a(n-32) +1184*a(n-34) -1009*a(n-36) -616*a(n-38) +123*a(n-40) +125*a(n-42) +43*a(n-44) +9*a(n-46) +a(n-48) for n>49

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Cf. A261113

Sequence in context: A286440 A271448 A176089 * A219082 A123099 A263524

Adjacent sequences:  A261109 A261110 A261111 * A261113 A261114 A261115

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 08 2015

STATUS

approved

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Last modified May 21 10:48 EDT 2019. Contains 323443 sequences. (Running on oeis4.)