|
| |
|
|
A230270
|
|
Number of nX3 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero
|
|
1
|
|
|
|
0, 2, 28, 258, 2318, 19996, 173042, 1495602, 12923884, 111679970, 965051522, 8339221132, 72061022634, 622694890854, 5380841364452, 46497015154242, 401790774458110, 3471961070277860, 30001967293824306, 259253494870328354
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,2
|
|
|
COMMENTS
|
Column 3 of A230275
|
|
|
LINKS
|
R. H. Hardin, Table of n, a(n) for n = 1..210
|
|
|
FORMULA
|
Empirical: a(n) = 11*a(n-1) -18*a(n-2) -22*a(n-3) -6*a(n-4) +162*a(n-5) -29*a(n-6) -105*a(n-7) -62*a(n-8) -22*a(n-9) -4*a(n-10)
|
|
|
EXAMPLE
|
Some solutions for n=3
..0..2..1....0..1..2....0..2..1....0..1..0....0..2..0....0..1..2....0..1..2
..1..2..0....2..1..0....1..1..1....1..2..2....1..1..1....0..0..0....2..0..0
..0..1..0....0..1..2....2..0..2....0..0..1....2..0..2....1..2..1....1..2..1
|
|
|
CROSSREFS
|
Sequence in context: A183067 A056261 A326248 * A230759 A229581 A230589
Adjacent sequences: A230267 A230268 A230269 * A230271 A230272 A230273
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
R. H. Hardin, Oct 14 2013
|
|
|
STATUS
|
approved
|
| |
|
|
