%I #30 Feb 19 2015 00:11:48

%S 0,2,2,6,2,6,10,14,2,6,10,14,10,22,34,30,2,6,10,14,10,22,34,30,10,22,

%T 34,38,42,78,98,62,2,6,10,14,10,22,34,30,10,22,34,38,42,78,98,62,10,

%U 22,34,38,42,78,98,70,42,78,106,118,162,254,258,126,2,6,10,14,10

%N a(n) = 2*A160552(n).

%H N. J. A. Sloane, <a href="/wiki/Catalog_of_Toothpick_and_CA_Sequences_in_OEIS">Catalog of Toothpick and Cellular Automata Sequences in the OEIS</a>

%H <a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a>

%F It appears that a(n) = A169708(n)/2, n >= 1.

%e Written as an irregular triangle in which row lengths are the terms of A011782 the sequence begins:

%e 0;

%e 2;

%e 2,6;

%e 2,6,10,14;

%e 2,6,10,14,10,22,34,30;

%e 2,6,10,14,10,22,34,30,10,22,34,38,42,78,98,62;

%e 2,6,10,14,10,22,34,30,10,22,34,38,42,78,98,62,10,22,34,38,42,78,98,70,42,78,106,118,162,254,258,126;

%e It appears that row sums give 0 together with A004171, (see also A081294).

%e It appears that right border gives the nonnegative terms of A000918, (see also A095121).

%Y Cf. A000918, A004171, A081294, A095121, A139250, A160164, A160552, A169707, A169708, A187220.

%K nonn,tabf

%O 0,2

%A _Omar E. Pol_, Feb 13 2015

%E Edited by _Omar E. Pol_, Feb 18 2015