%N Number of toothpicks or D-toothpicks added at n-th stage in the toothpick structure of A220520.
%C Essentially the first differences of A220520. First differs from A194441 at a(14).
%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:
%Y Cf. A139250, A139251, A194441, A194443.
%A _Omar E. Pol_, Dec 15 2012