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A233871 Number of (n+1) X (3+1) 0..7 arrays with every 2 X 2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 21. 1
5984, 26488, 139880, 907940, 6146640, 46051092, 343425768, 2756337624, 21588683624, 180216035036, 1450701605384, 12389982435088, 101284661425880, 876390668712900, 7225949971653824, 62982354720043128, 521759806201089312 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 3 of A233875.
LINKS
EXAMPLE
Some solutions for n=3
..0..0..6..6....5..7..0..6....2..2..2..7....1..3..3..3....4..7..1..7
..3..6..3..0....5..0..0..3....0..7..0..2....6..7..0..7....7..1..4..1
..0..0..6..6....5..7..0..6....6..6..6..5....0..6..6..6....4..1..7..7
..3..6..7..0....2..1..1..4....0..7..0..2....3..0..7..0....7..1..0..7
CROSSREFS
Cf. A233875.
Sequence in context: A364861 A237011 A274362 * A182295 A028546 A055108
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 17 2013
STATUS
approved

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Last modified April 22 17:34 EDT 2024. Contains 371905 sequences. (Running on oeis4.)