%I #9 Dec 19 2013 11:44:01

%S 0,1,3,5,9,11,15,20,28,30,34,40,52,58,64,75,91,93,97,103,115,129,145,

%T 163,187,197,205,219,247,261,277,300,332,334,338,344,356,370,386,406,

%U 438,464,484,506,546,576,616,655,703,721,729

%N Number of toothpicks and D-toothpicks after n-th stage in the D-toothpick "narrow" triangle of the third kind, second version.

%C The structure is essentially the same as A220522 but here the borders do not contain D-toothpicks with exposed endpoints except the initial D-toothpick. The structure is one of the oblique wedges of several D-toothpick structures. For more information see A220500. The first differences (A233763) give the number of toothpicks or D-toothpicks added at n-th stage.

%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>

%Y Cf. A139250, A220500, A220522, A233760, A233763.

%K nonn

%O 0,3

%A _Omar E. Pol_, Dec 15 2013