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A185986 1/128 the number of (n+2)X4 binary arrays with each 3X3 subblock trace equal to some horizontal or vertical neighbor 3X3 subblock trace 1
10, 76, 722, 6036, 52966, 462288, 4038360, 35286678, 308300326, 2693690508, 23535373610, 205633797210, 1796669120244, 15697904088278, 137156137242726, 1198364180196068, 10470378773781502, 91482066577657294, 799299498708328880 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A185993

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

FORMULA

Empirical: a(n)=10*a(n-1)-11*a(n-2)-6*a(n-3)+51*a(n-4)+30*a(n-5)-330*a(n-6)-190*a(n-7)+568*a(n-8)-1888*a(n-9)+3442*a(n-10)-2512*a(n-11)+328*a(n-12)-1862*a(n-13)+4596*a(n-14)-1224*a(n-15)-432*a(n-16)

EXAMPLE

Some solutions for 6X4

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

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

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

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

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

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

CROSSREFS

Sequence in context: A107903 A075489 A184273 * A225828 A000808 A159579

Adjacent sequences:  A185983 A185984 A185985 * A185987 A185988 A185989

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 08 2011

STATUS

approved

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Last modified May 17 19:51 EDT 2022. Contains 353778 sequences. (Running on oeis4.)