A275092 Number of 4Xn 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.

14, 486, 1024, 3088, 12816, 53132, 232156, 984288, 4304608, 18686420, 81545856, 355534620, 1548803468, 6754327372, 29407955624, 128203071808, 558360538308, 2433519428172, 10601710686752, 46199290950200, 201293175872408

Offset

1,1

Comments

Row 4 of A275090.

Links

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

R. H. Hardin, Empirical recurrence of order 84

Formula

Empirical recurrence of order 84 (see link above)

Example

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

Crossrefs

Cf. A275090.

Sequence in context: A200061 A171208 A331612 * A275348 A317635 A128051

Adjacent sequences: A275089 A275090 A275091 * A275093 A275094 A275095

Keyword

nonn

Author

R. H. Hardin, Jul 16 2016

Status

approved