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A302080
Number of nX7 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.
1
21, 154, 1166, 10526, 94846, 893236, 8320747, 78493707, 737846612, 6957491738, 65543473064, 617903565224, 5823935501973, 54900790436419, 517515255716184, 4878411825620594, 45986764069646418, 433498222189624372
OFFSET
1,1
COMMENTS
Column 7 of A302081.
FORMULA
Empirical recurrence of order 52 (see link above)
EXAMPLE
Some solutions for n=5
..0..0..1..0..0..0..1. .0..0..1..0..1..0..1. .0..1..0..0..1..0..1
..1..1..1..0..1..0..1. .1..1..1..0..1..0..1. .0..1..1..0..1..0..1
..0..0..1..0..1..0..0. .1..0..1..0..1..0..0. .0..0..0..0..0..0..1
..1..0..1..1..1..1..0. .1..1..1..1..1..1..0. .0..1..0..0..1..0..1
..1..0..0..1..0..1..1. .0..1..0..1..0..1..1. .0..0..0..0..1..0..0
CROSSREFS
Cf. A302081.
Sequence in context: A184368 A078396 A301883 * A331528 A180374 A108675
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 31 2018
STATUS
approved