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A263912 Number of (2n+1)X(7+2) 0..1 arrays with each row and column modulo 3 equal to 1, read as a binary number with top and left being the most significant bits. 1
2241, 29452071, 699094613961, 19392931688071671, 559629036639216996921, 16310142164609472165404391, 476531066653870544234088649641, 13931367290098694757277662337480791 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A263913 (nonzero terms).

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..53

FORMULA

Empirical: a(n) = 41679*a(n-1) -410712498*a(n-2) +1452478559886*a(n-3) -2336950596975813*a(n-4) +1862617418228921571*a(n-5) -787558392124231703688*a(n-6) +182199417380911916513856*a(n-7) -23215178003601108008066688*a(n-8) +1584533498783486314495355136*a(n-9) -53217577938863645271064461312*a(n-10) +683124888479882769100270927872*a(n-11)

EXAMPLE

Some solutions for n=1

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

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

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

CROSSREFS

Cf. A263913.

Sequence in context: A002520 A183771 A271470 * A251051 A107529 A260608

Adjacent sequences:  A263909 A263910 A263911 * A263913 A263914 A263915

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 29 2015

STATUS

approved

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Last modified October 16 13:32 EDT 2019. Contains 328093 sequences. (Running on oeis4.)