A296592 Number of n X n 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1, 2 or 3 neighboring 1's.

1, 11, 228, 16524, 4254377, 3553672817, 10046940260800, 95593682736547484, 3048748598852691707372, 326806923379819512235330165, 117671612236955708975981838902711

Offset

1,2

Comments

Diagonal of A296599.

Links

R. H. Hardin, Table of n, a(n) for n = 1..12

Example

Some solutions for n=4
..0..0..0..1. .0..1..1..0. .1..0..0..0. .0..0..0..0. .1..0..1..0
..1..0..1..1. .0..0..1..1. .1..0..1..0. .1..0..1..1. .1..0..1..0
..1..0..0..1. .0..1..0..1. .1..0..1..1. .1..0..1..0. .1..0..1..0
..0..0..1..1. .1..0..1..1. .1..1..0..1. .1..1..0..0. .0..1..1..1

Crossrefs

Cf. A296599.

Sequence in context: A120850 A289716 A305141 * A108518 A346423 A077736

Adjacent sequences: A296589 A296590 A296591 * A296593 A296594 A296595

Keyword

nonn

Author

R. H. Hardin, Dec 16 2017

Status

approved