A275084 Number of n X n 0..2 arrays with no element equal to any value at offset (0,-2), (-1,-2) or (-2,-1) and new values introduced in order 0..2.

1, 14, 192, 3088, 87924, 5038428, 512150588, 96851464412, 34421374000200, 22305044857494304, 26793208475912331160, 59563800755983637416156, 244126929061976907515769752

Offset

1,2

Comments

Diagonal of A275090.

Links

Table of n, a(n) for n=1..13.

Example

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

Crossrefs

Cf. A275090.

Sequence in context: A055759 A368702 A368536 * A086946 A158530 A348549

Adjacent sequences: A275081 A275082 A275083 * A275085 A275086 A275087

Keyword

nonn

Author

R. H. Hardin, Jul 16 2016

Status

approved