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A269086 Number of nX5 binary arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two not more than once. 1
23, 191, 1531, 11314, 80422, 555789, 3761534, 25063389, 164926651, 1074440360, 6941695514, 44537043804, 284052377508, 1802408061740, 11386034886784, 71645923776799, 449267054051740, 2808501899850347, 17508131088788801 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A269089.
LINKS
FORMULA
Empirical: a(n) = 2*a(n-1) +41*a(n-2) +54*a(n-3) -509*a(n-4) -2182*a(n-5) -2830*a(n-6) +1766*a(n-7) +7914*a(n-8) +2584*a(n-9) -10583*a(n-10) -6092*a(n-11) +11506*a(n-12) +5348*a(n-13) -11688*a(n-14) -620*a(n-15) +9251*a(n-16) -4462*a(n-17) -3137*a(n-18) +4774*a(n-19) -2365*a(n-20) +338*a(n-21) +198*a(n-22) -106*a(n-23) +12*a(n-24) +4*a(n-25) -a(n-26)
EXAMPLE
Some solutions for n=4
..0..0..1..0..1. .1..0..0..1..1. .0..0..0..1..0. .1..0..0..0..0
..0..0..0..0..1. .0..0..0..0..0. .0..0..0..1..0. .0..1..0..1..0
..1..0..1..0..0. .0..0..0..0..0. .1..0..0..0..0. .0..0..1..0..0
..0..0..0..1..0. .1..0..1..0..1. .0..0..1..0..0. .0..0..0..0..1
CROSSREFS
Cf. A269089.
Sequence in context: A129052 A201859 A232150 * A160083 A140545 A062640
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 19 2016
STATUS
approved

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Last modified April 20 02:14 EDT 2024. Contains 371798 sequences. (Running on oeis4.)