1,1

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.

Table of n, a(n) for n=1..109.

n-Cell Thick Patterns (1) at Infinite Growth

n-Cell Thick Patterns & Infinite Growth at ConwayLife.com forums

One Cell Thick Pattern at LifeWiki

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.

Sequence in context: A181016 A103479 A036174 * A097439 A196092 A196089

Adjacent sequences: A162455 A162456 A162457 * A162459 A162460 A162461

nonn

Nathaniel Johnston, Jul 04 2009

approved