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A260925 Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 00101011 or 01010101 1
491, 831, 3358, 10617, 27582, 81848, 253264, 736065, 2137558, 6366003, 18836612, 55281733, 162975870, 481592042, 1419353824, 4182760615, 12337678966, 36391723458, 107281631494, 316367367773, 932912838818, 2751181217369 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A260927

LINKS

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

FORMULA

Empirical: a(n) = a(n-2) +54*a(n-4) +147*a(n-6) -232*a(n-8) -760*a(n-10) +1201*a(n-12) +1735*a(n-14) -4951*a(n-16) +1746*a(n-18) +4365*a(n-20) -3877*a(n-22) -2176*a(n-24) +4748*a(n-26) -2239*a(n-28) +25*a(n-30) +151*a(n-32) +117*a(n-34) -35*a(n-36) -2*a(n-38) -a(n-40) for n>42

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Cf. A260927

Sequence in context: A180457 A271664 A082079 * A217118 A205200 A205058

Adjacent sequences:  A260922 A260923 A260924 * A260926 A260927 A260928

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 04 2015

STATUS

approved

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Last modified June 25 10:04 EDT 2022. Contains 354844 sequences. (Running on oeis4.)