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A300535 Number of nX4 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1
1, 16, 36, 300, 1436, 8974, 52012, 311037, 1845926, 11005063, 65583577, 390991796, 2331383710, 13900965032, 82892406341, 494278699068, 2947415376806, 17575447550343, 104803246864144, 624945156416678, 3726574928599652 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 4 of A300539.
LINKS
FORMULA
Empirical recurrence of order 75 (see link above)
EXAMPLE
Some solutions for n=5
..0..0..0..1. .0..0..1..1. .0..1..0..0. .0..0..0..0. .0..0..0..1
..0..0..1..1. .0..1..1..1. .1..1..0..1. .0..1..1..0. .0..1..0..0
..1..1..0..0. .0..0..0..0. .1..1..1..1. .1..1..0..0. .1..1..0..0
..1..1..0..0. .1..1..0..1. .0..0..0..1. .1..0..1..0. .1..1..0..1
..1..1..0..0. .1..1..1..1. .0..0..1..1. .0..0..0..0. .0..1..1..1
CROSSREFS
Cf. A300539.
Sequence in context: A273373 A264546 A218523 * A053893 A068833 A116190
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 08 2018
STATUS
approved

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Last modified July 20 20:25 EDT 2024. Contains 374459 sequences. (Running on oeis4.)