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A304700 Number of nX4 0..1 arrays with every element unequal to 1, 2, 4, 5 or 6 king-move adjacent elements, with upper left element zero. 1
2, 10, 21, 48, 215, 798, 3055, 9810, 41744, 159183, 570536, 2308616, 8872579, 33367632, 131450744, 506761978, 1940496321, 7558901654, 29184688564, 112473463039, 436144732416, 1685260077151, 6509144124179, 25196323364937 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A304704.

LINKS

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

R. H. Hardin, Empirical recurrence of order 67

FORMULA

Empirical recurrence of order 67 (see link above)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A304704.

Sequence in context: A294550 A296555 A231376 * A318548 A318210 A080881

Adjacent sequences:  A304697 A304698 A304699 * A304701 A304702 A304703

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 17 2018

STATUS

approved

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Last modified August 24 18:12 EDT 2019. Contains 326295 sequences. (Running on oeis4.)