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A359521
Number of free mature snake polyominoes of n cells, where mature means that the snake cannot grow in either direction.
0
4, 0, 26, 0, 194, 17, 1086, 152, 6140, 1006, 32713, 6335, 172379, 38800
(list; graph; refs; listen; history; text; internal format)
OFFSET
15,1
LINKS
Table of n, a(n) for n=15..28.
EXAMPLE
a(15) = 4 because of:
OOO OOO OOO OOO
O O O O O O O O
O OO O OO O OO OO OO
O O OO O OOO O OO O
OOOOO OOOO OOO OOO
CROSSREFS
Cf. A002013.
Sequence in context: A057402 A269214 A269276 * A172394 A172395 A358653
Adjacent sequences: A359518 A359519 A359520 * A359522 A359523 A359524
KEYWORD
nonn,more
AUTHOR
John Mason, Jan 05 2023
STATUS
approved

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Last modified September 28 10:43 EDT 2024. Contains 376292 sequences.
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