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A220317 Equals two maps: number of nX3 binary arrays indicating the locations of corresponding elements equal to exactly two of their king-move neighbors in a random 0..2 nX3 array 0
2, 24, 353, 3167, 28215, 237144, 1944692, 15735116, 126513306, 1014237718, 8120891182, 64989221681, 519982144806, 4160063431147 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 3 of A220319
LINKS
EXAMPLE
Some solutions for n=3
..0..1..0....0..0..0....1..1..1....1..0..0....1..1..0....0..1..1....0..0..0
..0..1..1....1..1..1....0..1..1....0..0..0....1..1..0....1..0..0....0..0..1
..0..0..1....0..1..0....0..0..0....1..0..1....1..0..1....0..1..0....1..0..0
CROSSREFS
Sequence in context: A333715 A081065 A043699 * A220340 A366003 A134805
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 10 2012
STATUS
approved

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Last modified June 19 00:22 EDT 2024. Contains 373492 sequences. (Running on oeis4.)