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.

5984, 26488, 139880, 907940, 6146640, 46051092, 343425768, 2756337624, 21588683624, 180216035036, 1450701605384, 12389982435088, 101284661425880, 876390668712900, 7225949971653824, 62982354720043128, 521759806201089312

Offset

1,1

Comments

Column 3 of A233875.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

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

Adjacent sequences: A233868 A233869 A233870 * A233872 A233873 A233874

Keyword

nonn

Author

R. H. Hardin, Dec 17 2013

Status

approved