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a(3) = 0; otherwise, a(n) = A152389(n) - 1.
3

%I #25 Nov 03 2024 16:44:15

%S 0,0,0,1,5,11,13,47,19,1,14,14,23,27,39,31,23,19,24,19,18,34,29,27,92,

%T 23,27,32,35,102,147,59,579,41,56,90,105,261,275,48,208,56,51,55,96,

%U 53,167,193,810,102,51,51,82,56,78,245,415,61,61,311,114,115

%N a(3) = 0; otherwise, a(n) = A152389(n) - 1.

%H LifeWiki, <a href="https://conwaylife.com/wiki/One-cell-thick_pattern">One cell thick pattern</a>

%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GameofLife.html">Game of Life</a>

%e After a single unique pattern consisting of a solid 3 by 8-cell block, the sequence of patterns following a 10-cell straight line becomes a cyclical process of repeating patterns. Therefore a(10) = 1.

%Y Cf. A152301, A152389.

%K nonn

%O 1,5

%A _Axel Harvey_, Sep 29 2004

%E a(21)-a(34) from _John M. Campbell_, May 05 2012

%E More terms and definition changed by _Eric M. Schmidt_, Aug 15 2012