A300545 Number of nX7 0..1 arrays with every element equal to 1, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

8, 1568, 117146, 8514930, 632777378, 47042626155, 3494400946777, 259582877324570, 19283328543117575, 1432478084282766997, 106412759390199221479, 7904956066250728907461, 587225918180407015680952

Offset

1,1

Comments

Column 7 of A300546.

Links

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

Example

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

Crossrefs

Cf. A300546.

Sequence in context: A248386 A114617 A162014 * A300972 A300929 A229150

Adjacent sequences: A300542 A300543 A300544 * A300546 A300547 A300548

Keyword

nonn

Author

R. H. Hardin, Mar 08 2018

Status

approved