A302014 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.

64, 8192, 772272, 74917424, 7320574992, 714887543376, 69786476414080, 6812969999327424, 665123348184876224, 64933307877775254592, 6339175601773524948352, 618868043706883764304384

Offset: 1

Author

R. H. Hardin, Mar 30 2018

Keywords

• nonn

Comments

Row 7 of A302010.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 78

Crossrefs

Cf. A302010.

Formula

Empirical recurrence of order 78 (see link above)