|
| |
|
|
A336267
|
|
Number of free polyominoes of width 3 and height n.
|
|
1
|
|
|
|
1, 6, 24, 181, 941, 4662, 23691, 119271, 603760, 3050402, 15428576, 78004550, 394462578, 1994595585, 10086050889, 51001111356, 257894037378, 1304071170194, 6594196094078, 33344335235915, 168609627579175, 852594638783225, 4311246376730011
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,2
|
|
|
COMMENTS
|
The sequence can be generated using a series of recursive formulas in a fashion similar to A353067. - John Mason, Nov 04 2022
|
|
|
LINKS
|
|
|
|
EXAMPLE
|
a(2)=6, bounding box 2 X 3 as in A335711.
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
|
|
|
EXTENSIONS
|
|
|
|
STATUS
|
approved
|
| |
|
|
