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A295118
Number of nX6 0..1 arrays with each 1 horizontally or vertically adjacent to 1 or 4 1s.
1
9, 85, 665, 5793, 49302, 420519, 3590821, 30650456, 261518933, 2232138695, 19050970320, 162588578831, 1387635803762, 11842933188678, 101074697830670, 862633152321378, 7362232721371648, 62833751476788374, 536261351701937815
OFFSET
1,1
COMMENTS
Column 6 of A295120.
FORMULA
Empirical recurrence of order 78 (see link above)
EXAMPLE
Some solutions for n=5
..0..0..1..1..0..0. .0..0..1..0..0..1. .1..0..0..1..1..0. .0..0..1..1..0..0
..1..0..0..0..0..1. .0..0..1..0..0..1. .1..0..0..0..0..1. .0..0..0..0..0..0
..1..0..1..1..0..1. .1..1..0..0..0..0. .0..1..1..0..0..1. .0..0..0..0..1..0
..0..0..0..0..0..0. .0..0..0..0..0..0. .0..0..0..0..0..0. .0..0..0..1..1..1
..0..0..0..1..1..0. .0..0..0..0..0..0. .0..1..1..0..0..0. .0..0..0..0..1..0
CROSSREFS
Cf. A295120.
Sequence in context: A335670 A196434 A197197 * A339550 A228417 A015580
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 15 2017
STATUS
approved