login
A302078
Number of n X 5 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.
1
8, 35, 154, 692, 3048, 13712, 61536, 277248, 1248512, 5627072, 25357376, 114292352, 515113792, 2321755072, 10464487552, 47166021056, 212586287680, 958175791232, 4318696862016, 19465338739648, 87734436661888, 395438540064704
OFFSET
1,1
COMMENTS
Column 5 of A302081.
LINKS
FORMULA
Empirical: a(n) = 3*a(n-1) +17*a(n-2) -38*a(n-3) -68*a(n-4) +136*a(n-5) +64*a(n-6) -128*a(n-7) for n>9.
EXAMPLE
Some solutions for n=5
..0..1..0..1..0. .0..1..1..1..0. .0..1..0..1..0. .0..1..0..1..0
..0..1..1..1..0. .0..1..0..1..1. .0..0..1..1..0. .0..1..1..0..0
..0..1..0..1..1. .0..0..0..0..1. .0..1..0..1..0. .0..1..0..1..0
..0..1..0..0..1. .1..0..1..0..1. .0..0..0..1..0. .0..1..0..1..0
..0..1..1..0..0. .1..1..1..0..0. .0..1..0..0..0. .0..1..1..1..0
CROSSREFS
Cf. A302081.
Sequence in context: A340522 A114569 A189599 * A320405 A279379 A098999
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 31 2018
STATUS
approved