A233765 - OEIS

%I #13 Dec 22 2013 00:04:01

%S 0,1,2,2,4,2,4,6,8,2,4,6,10,10,8,14,16,2,4,6,10,10,10,18,24,18,8,14,

%T 22,26,16,30,32,2,4,6,10,10,10,18,24,18,10,18,28,38,30,50,54,34,8,14,

%U 22,26,22,42,56,50,16,30,46,58,32,62,64,2,4,6,10,10

%N Number of toothpicks or D-toothpicks added at n-th stage to the structure of the toothpick "wide" triangle of A233764.

%C Essentially the first differences of A233764.

%C First differs from A170905 at a(24).

%C First differs from A233971 at a(25).

%C First differs from A233781 at a(44).

%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/To#toothpick">Index entries for sequences related to toothpick sequences</a>

%e Written as an irregular triangle in which the row lengths is A011782 the sequence (starting from 1) begins:

%e 1;

%e 2;

%e 2,4;

%e 2,4,6,8;

%e 2,4,6,10,10,8,14,16;

%e 2,4,6,10,10,10,18,24,18,8,14,22,26,16,30,32;

%e 2,4,6,10,10,10,18,24,18,10,18,28,38,30,50,54,34,8,14,22,26,22,42,56,50,16,30,46,58,32,62,64;

%e Right border gives A000079.

%Y Cf. A000079, A011782, A139251, A220501, A220521, A231349, A233764, A233781, A233971.

%K nonn,tabf

%O 0,3

%A _Omar E. Pol_, Dec 16 2013