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A284767 Number of n X 4 0..1 arrays with the number of 1's horizontally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1. 1
2, 52, 720, 10120, 145822, 2134812, 31677488, 474539092, 7162528912, 108751977400, 1659266548448, 25419213710160, 390755520225882, 6024619021179564, 93124153758520074, 1442654093474307468 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A284771.
LINKS
EXAMPLE
Some solutions for n=4
..1..1..0..0. .0..0..0..1. .0..1..0..1. .0..0..1..1. .0..1..0..1
..0..0..0..1. .0..1..0..1. .0..0..1..1. .0..1..0..1. .0..0..1..1
..1..1..1..1. .0..1..0..1. .0..1..1..1. .0..0..0..0. .1..0..0..1
..0..0..0..1. .0..1..1..0. .0..0..0..0. .0..1..1..1. .0..1..1..0
CROSSREFS
Cf. A284771.
Sequence in context: A034311 A053317 A123803 * A101930 A297756 A174779
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 02 2017
STATUS
approved

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Last modified July 17 05:50 EDT 2024. Contains 374360 sequences. (Running on oeis4.)