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A301998 Number of nX7 0..1 arrays with every element equal to 1, 2 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero. 1
8, 128, 1108, 10982, 122232, 1366374, 15243860, 169636124, 1884309898, 20919022400, 232254936138, 2579000358404, 28639373845122, 318037976285038, 3531770886607536, 39219734913406306, 435528277377832336 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A301999.

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

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

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

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

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

CROSSREFS

Cf. A301999.

Sequence in context: A302810 A061549 A303471 * A105094 A208711 A242355

Adjacent sequences:  A301995 A301996 A301997 * A301999 A302000 A302001

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 30 2018

STATUS

approved

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Last modified April 2 19:05 EDT 2020. Contains 333190 sequences. (Running on oeis4.)