A280677 Number of 5Xn 0..2 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.

41, 4568, 181640, 9439606, 474736149, 23952262535, 1208240638772, 60949510593245, 3074564570571027, 155095359625755139, 7823728447342567501, 394665220545896300250, 19908746786901511218365, 1004289676988490253656371

Offset

1,1

Comments

Row 5 of A280673.

Links

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

Example

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

Crossrefs

Cf. A280673.

Sequence in context: A107690 A068815 A093174 * A209104 A233079 A159992

Adjacent sequences: A280674 A280675 A280676 * A280678 A280679 A280680

Keyword

nonn

Author

R. H. Hardin, Jan 07 2017

Status

approved