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A262236 Number of (n+3) X (1+3) 0..1 arrays with each row and column divisible by 11, read as a binary number with top and left being the most significant bits. 1
2, 3, 6, 12, 24, 47, 94, 187, 373, 745, 1490, 2979, 5958, 11916, 23832, 47663, 95326, 190651, 381301, 762601, 1525202, 3050403, 6100806, 12201612, 24403224, 48806447, 97612894, 195225787, 390451573, 780903145, 1561806290, 3123612579, 6247225158 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A262240.

LINKS

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

FORMULA

Empirical: a(n) = 3*a(n-1) -2*a(n-2) -a(n-5) +3*a(n-6) -2*a(n-7).

Empirical: G.f.: -x*(-2+3*x-x^2-x^5+2*x^6) / ( (x-1)*(2*x-1)*(1+x)*(x^4-x^3+x^2-x+1) ). - R. J. Mathar, Sep 16 2015

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

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

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

CROSSREFS

Cf. A262240.

Sequence in context: A124313 A049890 A351915 * A246878 A251709 A293340

Adjacent sequences:  A262233 A262234 A262235 * A262237 A262238 A262239

KEYWORD

nonn

AUTHOR

R. H. Hardin, Sep 15 2015

STATUS

approved

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Last modified October 6 12:35 EDT 2022. Contains 357264 sequences. (Running on oeis4.)