A298385 - OEIS

A298385

Number of nX4 0..1 arrays with every element equal to 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.

2, 52, 223, 996, 5180, 26926, 135226, 690918, 3547086, 18140017, 92825596, 475512514, 2435109783, 12469673140, 63863260360, 327072500829, 1675063501190, 8578763890816, 43935874769921, 225015889086384, 1152411732625826

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 4 of A298389.

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=7

..0..1..0..1. .0..1..0..1. .0..0..0..0. .0..1..0..0. .0..0..0..1

..0..1..0..1. .0..1..1..0. .1..1..1..1. .1..0..1..1. .1..1..0..1

..1..0..0..1. .1..1..1..1. .0..0..1..0. .0..1..1..1. .1..0..0..0

..0..1..0..1. .0..1..0..1. .1..1..1..0. .1..1..0..0. .0..1..1..1

..0..0..1..1. .1..0..1..0. .0..1..1..1. .0..1..1..0. .1..1..1..1

..0..1..0..1. .1..0..1..0. .0..0..1..0. .0..1..1..1. .0..1..0..0

..1..1..0..1. .0..1..0..0. .1..1..0..1. .0..0..0..1. .0..1..1..1

CROSSREFS

Cf. A298389.

Sequence in context: A298556 A298766 A299563 * A299303 A299461 A300104

Adjacent sequences: A298382 A298383 A298384 * A298386 A298387 A298388

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 18 2018

STATUS

approved