A281932 Number of nX4 0..1 arrays with no element equal to more than four of its king-move neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

0, 6, 312, 6304, 105766, 1488168, 19173138, 233189094, 2717934337, 30694746766, 338284153075, 3655878921594, 38880261356722, 407983475386552, 4232650810058466, 43484119577595732, 442946653502633411

Offset

1,2

Comments

Column 4 of A281936.

Links

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

R. H. Hardin, Empirical recurrence of order 69

Formula

Empirical recurrence of order 69 (see link above)

Example

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

Crossrefs

Cf. A281936.

Sequence in context: A015103 A282373 A123181 * A074656 A233108 A207816

Adjacent sequences: A281929 A281930 A281931 * A281933 A281934 A281935

Keyword

nonn

Author

R. H. Hardin, Feb 02 2017

Status

approved