|
|
A210138
|
|
Number of (n+1)X4 0..3 arrays containing all values 0..3 with every 2X2 subblock having one, two or four distinct values, and new values 0..3 introduced in row major order
|
|
1
|
|
|
105, 4349, 159327, 5451164, 178904077, 5714971168, 179321691502, 5559548788474, 170972595046842, 5229087409961369, 159331519832860386, 4842527307715760107, 146922920026150589111, 4452400930651345522825, 134818625964532109683635
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
FORMULA
|
Empirical: a(n) = 89*a(n-1) -3068*a(n-2) +51966*a(n-3) -443001*a(n-4) +1546826*a(n-5) +1718332*a(n-6) -24576952*a(n-7) +30663994*a(n-8) +107350909*a(n-9) -226371596*a(n-10) -140409398*a(n-11) +501187032*a(n-12) -47667796*a(n-13) -343494224*a(n-14) +74492360*a(n-15) +92532416*a(n-16) -19372128*a(n-17) -8588160*a(n-18) +1382400*a(n-19)
|
|
EXAMPLE
|
Some solutions for n=4
..0..0..0..0....0..0..0..0....0..0..1..2....0..1..0..0....0..0..1..1
..0..1..1..0....0..0..1..0....3..3..2..1....1..0..1..0....0..1..1..2
..1..0..0..1....1..0..1..0....2..2..2..1....2..3..2..3....2..3..1..1
..0..0..0..0....1..0..0..1....2..3..2..1....2..2..2..2....3..2..0..1
..2..0..3..3....1..0..2..3....1..0..1..1....3..2..0..2....1..0..0..0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|