A302370 Number of 4Xn 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

8, 3, 109, 77, 918, 3125, 21831, 125193, 824459, 5383504, 35779184, 240480550, 1615536651, 10916466595, 73707212142, 498626574631, 3372684616301, 22824815728427, 154471448375476, 1045558911080013, 7077203544387174

Offset

1,1

Comments

Row 4 of A302367.

Links

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

R. H. Hardin, Empirical recurrence of order 63

Formula

Empirical recurrence of order 63 (see link above)

Example

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

Crossrefs

Cf. A302367.

Sequence in context: A302462 A303244 A038281 * A303086 A131502 A302891

Adjacent sequences: A302367 A302368 A302369 * A302371 A302372 A302373

Keyword

nonn

Author

R. H. Hardin, Apr 06 2018

Status

approved