

A297677


Number of n X 3 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 1 or 4 neighboring 1's.


1



7, 29, 150, 742, 3744, 18840, 94891, 477850, 2406649, 12120617, 61043229, 307433020, 1548331209, 7797889752, 39272660089, 197789648884, 996131790595, 5016837561113, 25266394843590, 127249627060291, 640869727748787
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,1


COMMENTS

Column 3 of A297682.


LINKS

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


FORMULA

Empirical: a(n) = 5*a(n1) a(n2) +8*a(n3) 5*a(n4) 30*a(n5) +17*a(n6).


EXAMPLE

Some solutions for n=7
..1..0..1. .0..1..0. .0..0..0. .0..0..1. .1..0..1. .0..1..0. .1..0..1
..1..0..0. .1..0..0. .0..0..1. .0..0..1. .1..0..0. .1..0..0. .1..0..0
..1..0..0. .0..0..1. .0..0..1. .0..1..0. .0..0..0. .0..0..0. .1..1..1
..0..1..0. .0..0..0. .1..0..0. .0..1..0. .0..0..1. .1..1..0. .1..0..0
..0..0..0. .0..0..1. .1..0..0. .0..0..1. .1..0..1. .0..0..0. .1..0..1
..0..1..0. .0..0..0. .1..0..0. .0..0..0. .0..1..0. .1..0..1. .0..0..0
..0..1..0. .0..0..1. .0..0..1. .1..1..0. .1..0..1. .0..0..0. .0..1..1


CROSSREFS

Cf. A297682.
Sequence in context: A333887 A179599 A266473 * A287860 A175208 A307954
Adjacent sequences: A297674 A297675 A297676 * A297678 A297679 A297680


KEYWORD

nonn


AUTHOR

R. H. Hardin, Jan 03 2018


STATUS

approved



