A269219 Number of 6Xn 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three exactly once.

0, 889056, 118872576, 17118725376, 2267772823680, 292321215814512, 36713945487331392, 4528086446983948224, 550465224463202188320, 66156064863501806179776, 7876627077577027391888640

Offset

1,2

Comments

Row 6 of A269214.

Links

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

Example

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

Crossrefs

Cf. A269214.

Sequence in context: A128286 A250571 A092016 * A224594 A105379 A186792

Adjacent sequences: A269216 A269217 A269218 * A269220 A269221 A269222

Keyword

nonn

Author

R. H. Hardin, Feb 20 2016

Status

approved