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A186844 Number of (n+1)X4 binary arrays with no 2X2 subblock diagonal sum less antidiagonal sum equal to any horizontal or vertical neighbor 2X2 subblock diagonal sum less antidiagonal sum 1
162, 970, 6138, 36988, 224714, 1371258, 8335676, 50707346, 308646310, 1877813892, 11425402866, 69522265266, 423014974740, 2573883848370, 15661241415990, 95293069634608, 579824378872438, 3528028603215862, 21466809826900456 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A186850

LINKS

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

FORMULA

Empirical: a(n)=2*a(n-1)+11*a(n-2)+63*a(n-3)+112*a(n-4)+120*a(n-5)+110*a(n-6)-849*a(n-7)-1709*a(n-8)-1167*a(n-9)+1006*a(n-10)+3341*a(n-11)+2742*a(n-12)+2484*a(n-13)-161*a(n-14)+363*a(n-15)-1203*a(n-16)+126*a(n-17)-1692*a(n-18)+806*a(n-19)-426*a(n-20)+204*a(n-21)+32*a(n-22) for n>23

EXAMPLE

Some solutions for 3X4

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

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

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

CROSSREFS

Sequence in context: A206210 A044985 A302283 * A319915 A302731 A206145

Adjacent sequences:  A186841 A186842 A186843 * A186845 A186846 A186847

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 27 2011

STATUS

approved

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Last modified October 14 11:51 EDT 2019. Contains 327997 sequences. (Running on oeis4.)