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A262237 Number of (n+3)X(2+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
3, 5, 13, 31, 85, 223, 669, 1733, 4805, 13777, 40959, 120497, 360369, 1076007, 3222433, 9644107, 28932321, 86626753, 259625329, 778451521, 2335100115, 7003688357, 21010301629, 63027427231, 189078464965, 567219534943 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A262240.

LINKS

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

FORMULA

Empirical: a(n) = 3*a(n-1) -a(n-2) +3*a(n-3) -a(n-4) +3*a(n-5) -a(n-6) +3*a(n-7) -a(n-8) +3*a(n-9) +706*a(n-10) -2118*a(n-11) +706*a(n-12) -2118*a(n-13) +706*a(n-14) -2118*a(n-15) +706*a(n-16) -2118*a(n-17) +706*a(n-18) -2118*a(n-19) -15709*a(n-20) +47127*a(n-21) -15709*a(n-22) +47127*a(n-23) -15709*a(n-24) +47127*a(n-25) -15709*a(n-26) +47127*a(n-27) -15709*a(n-28) +47127*a(n-29)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

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

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

CROSSREFS

Cf. A262240.

Sequence in context: A281874 A135532 A127600 * A051401 A304357 A296023

Adjacent sequences: A262234 A262235 A262236 * A262238 A262239 A262240

KEYWORD

nonn

AUTHOR

R. H. Hardin, Sep 15 2015

STATUS

approved

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Last modified December 6 12:11 EST 2022. Contains 358634 sequences. (Running on oeis4.)