A265935 Number of 7Xn 0..4 arrays with the absolute differences of each element with its with horizontal and antidiagonal neighbors unique.

78125, 157071768, 152267520, 225444912, 309447168, 579039920, 1135042936, 2998567088, 8724089616, 18964065400, 44566825520, 107404139812, 337477736424, 721835834136, 1878102206024, 4325671914740, 13771113959216, 29460813516752

Offset

1,1

Comments

Row 7 of A265928.

Links

R. H. Hardin, Table of n, a(n) for n = 1..35

Example

Some solutions for n=1
..4....1....3....1....3....1....1....1....2....4....4....2....0....4....0....2
..3....4....2....4....1....1....4....4....2....3....4....4....4....1....2....1
..0....3....1....0....1....3....4....4....4....4....3....4....4....3....3....0
..4....3....0....4....3....4....1....0....0....0....4....4....2....1....1....3
..4....2....1....4....0....1....4....3....1....1....1....0....2....0....0....3
..2....0....3....0....4....4....1....3....2....2....4....2....1....2....1....2
..1....3....4....1....2....0....2....4....0....1....3....3....0....1....4....2

Crossrefs

Cf. A265928.

Sequence in context: A017047 A017131 A017227 * A017335 A017455 A017587

Adjacent sequences: A265932 A265933 A265934 * A265936 A265937 A265938

Keyword

nonn

Author

R. H. Hardin, Dec 18 2015

Status

approved