A277941 Number of nX4 0..2 arrays with every element plus 1 mod 3 equal to some element at offset (-1,0) (-1,1) (0,-1) (0,1) or (1,0), with upper left element zero.

0, 74, 2353, 84970, 2967962, 103960169, 3638916907, 127378891305, 4458779090218, 156075459353260, 5463275862035992, 191236872538989228, 6694068173580106896, 234319606216204278149, 8202139030768885667342, 287108218400489269268262

Offset

1,2

Comments

Column 4 of A277945.

Links

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

R. H. Hardin, Empirical recurrence of order 70

Formula

Empirical recurrence of order 70 (see link above)

Example

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

Crossrefs

Cf. A277945.

Sequence in context: A222861 A242146 A007033 * A017790 A035732 A017737

Adjacent sequences: A277938 A277939 A277940 * A277942 A277943 A277944

Keyword

nonn

Author

R. H. Hardin, Nov 05 2016

Status

approved