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A262334 Number of (n+3)X(2+3) 0..1 arrays with each row and column divisible by 9, read as a binary number with top and left being the most significant bits. 1
4, 16, 64, 225, 841, 3249, 12996, 51984, 207936, 829921, 3316041, 13256881, 53027524, 212110096, 848440384, 3393645025, 13574347081, 54296922289, 217187689156, 868750756624, 3475003026496, 13900004649441, 55600003684681 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A262338.

LINKS

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

FORMULA

Empirical: a(n) = 6*a(n-1) -8*a(n-2) -8*a(n-3) +48*a(n-4) -64*a(n-5) +a(n-6) -6*a(n-7) +8*a(n-8) +8*a(n-9) -48*a(n-10) +64*a(n-11)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

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

CROSSREFS

Cf. A262338.

Sequence in context: A267729 A189154 A189336 * A065738 A248089 A248088

Adjacent sequences:  A262331 A262332 A262333 * A262335 A262336 A262337

KEYWORD

nonn

AUTHOR

R. H. Hardin, Sep 18 2015

STATUS

approved

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Last modified September 28 00:09 EDT 2022. Contains 357063 sequences. (Running on oeis4.)