A301350 Number of nX4 0..1 arrays with every element equal to 1, 2, 3, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

2, 30, 277, 2349, 19561, 165010, 1392131, 11741731, 99032014, 835272398, 7045026710, 59420627072, 501178143148, 4227144439913, 35653491957422, 300716364726693, 2536366776713612, 21392771375921024, 180435523636242529

Offset

1,1

Comments

Column 4 of A301354.

Links

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

R. H. Hardin, Empirical recurrence of order 72

Formula

Empirical recurrence of order 72 (see link above)

Example

Some solutions for n=5
..0..0..0..0. .0..0..1..1. .0..0..1..1. .0..0..0..0. .0..1..1..0
..1..0..1..1. .0..1..0..0. .0..1..0..0. .1..1..1..1. .0..0..1..0
..1..0..0..1. .0..1..0..0. .1..0..0..1. .0..1..0..0. .1..1..0..0
..1..1..0..1. .1..0..0..1. .0..1..1..1. .0..1..0..0. .1..0..1..0
..0..0..1..1. .1..1..1..1. .1..0..0..1. .0..1..1..0. .0..1..0..0

Crossrefs

Cf. A301354.

Sequence in context: A300423 A300685 A300608 * A036351 A189770 A245020

Adjacent sequences: A301347 A301348 A301349 * A301351 A301352 A301353

Keyword

nonn

Author

R. H. Hardin, Mar 19 2018

Status

approved