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A302169 Number of 7Xn 0..1 arrays with every element equal to 0, 1 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1
64, 86, 111, 361, 621, 1563, 2853, 7306, 12963, 33522, 61775, 157788, 293072, 746806, 1414502, 3560709, 6821117, 17041351, 33109869, 81878009, 160823108, 394307941, 783258522, 1903510955, 3817195020, 9202579162, 18623741941, 44557228577 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A302163.

LINKS

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

R. H. Hardin, Empirical recurrence of order 80

FORMULA

Empirical recurrence of order 80 (see link above)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

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

CROSSREFS

Cf. A302163.

Sequence in context: A141817 A008435 A223083 * A302640 A302432 A303202

Adjacent sequences:  A302166 A302167 A302168 * A302170 A302171 A302172

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 02 2018

STATUS

approved

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Last modified January 20 04:43 EST 2019. Contains 319323 sequences. (Running on oeis4.)