A278017 Number of 4Xn 0..2 arrays with every element plus 1 mod 3 equal to some element at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) or (1,0), with upper left element zero.

0, 198, 7204, 315060, 13597418, 586416930, 25289030636, 1090585845484, 47030883581446, 2028178188039288, 87463933186827030, 3771827912988136296, 162657739276664345490, 7014514100219472964700, 302496568863991268453194

Offset

1,2

Comments

Row 4 of A278014.

Links

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

R. H. Hardin, Empirical recurrence of order 63

Formula

Empirical recurrence of order 63 (see link above)

Example

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

Crossrefs

Cf. A278014.

Sequence in context: A227705 A331098 A290933 * A348602 A270849 A324454

Adjacent sequences: A278014 A278015 A278016 * A278018 A278019 A278020

Keyword

nonn

Author

R. H. Hardin, Nov 08 2016

Status

approved