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A261111 Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010001 00010101 or 01010101 1
289, 790, 2902, 10268, 35934, 127038, 449132, 1582692, 5580762, 19696792, 69493124, 245136960, 864834010, 3051137218, 10764053222, 37974619476, 133971821170, 472641282700, 1667438793734, 5882591495818, 20753304044252 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A261113

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) -2*a(n-2) +17*a(n-3) +16*a(n-4) +45*a(n-5) +44*a(n-6) +a(n-7) -14*a(n-8) -72*a(n-9) -126*a(n-10) -168*a(n-11) +14*a(n-12) +436*a(n-13) +288*a(n-14) -354*a(n-15) -316*a(n-16) +132*a(n-17) +181*a(n-18) -2*a(n-19) -53*a(n-20) -25*a(n-21) -3*a(n-22) +a(n-23) +5*a(n-24) +2*a(n-25) +a(n-26) +a(n-27) for n>28

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Cf. A261113

Sequence in context: A152852 A156572 A157990 * A218766 A188186 A112077

Adjacent sequences: A261108 A261109 A261110 * A261112 A261113 A261114

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 08 2015

STATUS

approved

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Last modified December 6 11:28 EST 2022. Contains 358631 sequences. (Running on oeis4.)