A300880 Number of nX7 0..1 arrays with every element equal to 0, 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

64, 1063, 4297, 34693, 345713, 3260568, 33392871, 350899542, 3640767606, 37969590958, 396898355661, 4145790945869, 43325433803276, 452863444729136, 4733605414721563, 49481042237838159, 517248751223641209

Offset

1,1

Comments

Column 7 of A300881.

Links

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

Example

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

Crossrefs

Cf. A300881.

Sequence in context: A301322 A300497 A300936 * A301490 A223070 A191900

Adjacent sequences: A300877 A300878 A300879 * A300881 A300882 A300883

Keyword

nonn

Author

R. H. Hardin, Mar 14 2018

Status

approved