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A259948 Number of (n+2)X(4+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00000101 1
365, 1507, 8699, 35765, 141619, 642779, 2922457, 12595119, 54554391, 241207419, 1062079283, 4640861117, 20328211369, 89287996191, 391693962409, 1716670831027, 7528074602903, 33022954863143, 144821506333677 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A259952

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) +6*a(n-2) +11*a(n-3) +70*a(n-4) -95*a(n-5) -212*a(n-6) +99*a(n-7) -450*a(n-8) +207*a(n-9) +1325*a(n-10) -637*a(n-11) +440*a(n-12) +561*a(n-13) -1601*a(n-14) +264*a(n-15) +325*a(n-16) -48*a(n-17) +103*a(n-18) -226*a(n-19) +17*a(n-20) -46*a(n-21) +20*a(n-22) -8*a(n-23) +2*a(n-24) for n>27

EXAMPLE

Some solutions for n=4

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

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

..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0

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

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

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

CROSSREFS

Cf. A259952

Sequence in context: A043443 A275271 A062681 * A203806 A251314 A275182

Adjacent sequences:  A259945 A259946 A259947 * A259949 A259950 A259951

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 10 2015

STATUS

approved

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Last modified December 4 02:40 EST 2021. Contains 349469 sequences. (Running on oeis4.)