OFFSET
1,1
COMMENTS
a(n) = 1 for n >= 39. a(1), a(5) and a(n) for n >= 39 were computed by Paul Callahan in 1998. The rest of the terms were computed in 2009.
LINKS
n-Cell Thick Patterns (1) at Infinite Growth
n-Cell Thick Patterns & Infinite Growth at ConwayLife.com forums
One Cell Thick Pattern at LifeWiki
EXAMPLE
a(5) = 5 because there is an infinitely-growing pattern that fits in a 5x5 box, but no infinitely-growing pattern that fits in a 5x4 box.
CROSSREFS
KEYWORD
nonn
AUTHOR
Nathaniel Johnston, Jul 04 2009
STATUS
approved