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A301883 Number of nX7 0..1 arrays with every element equal to 0, 1 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero. 1
21, 154, 823, 5463, 33853, 223869, 1454613, 9620565, 63336647, 419113710, 2770472419, 18336620495, 121358670826, 803332031961, 5318434541385, 35208666237989, 233111781026276, 1543314708909090, 10218090869079319 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A301884.

LINKS

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

R. H. Hardin, Empirical recurrence of order 52

FORMULA

Empirical recurrence of order 52 (see link above)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A301884.

Sequence in context: A184376 A184368 A078396 * A302080 A331528 A180374

Adjacent sequences:  A301880 A301881 A301882 * A301884 A301885 A301886

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 28 2018

STATUS

approved

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Last modified January 24 01:05 EST 2020. Contains 331178 sequences. (Running on oeis4.)