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A233761 Number of toothpicks or D-toothpicks added at n-th stage in the structure of the D-toothpick "wide" triangle of A233760.

%I A233761 #11 Dec 22 2013 00:04:48
%S A233761 0,1,2,2,4,2,4,6,8,2,4,6,12,14,12,14,16,2,4,6,12,14,20,22,26,22,12,18,
%T A233761 32,38,28,30,32,2,4,6,12,14,20,22,26,22,20,30,44,62,52,46,54,38,12,18,
%U A233761 36,46,56,62,74,74,30,42,72,86,60,62,64,2,4,6,12
%N A233761 Number of toothpicks or D-toothpicks added at n-th stage in the structure of the D-toothpick "wide" triangle of A233760.
%C A233761 Essentially the first differences of A233760.
%H A233761 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 A233761 <a href="/index/To#toothpick">Index entries for sequences related to toothpick sequences</a>
%F A233761 a(2n) = A220521(2n); a(2n+1) = A220521(2n+1) - 2.
%e A233761 Written as an irregular triangle in which the row lengths is A011782 the sequence (starting from 1) begins:
%e A233761 1;
%e A233761 2;
%e A233761 2,4;
%e A233761 2,4,6,8;
%e A233761 2,4,6,12,14,12,14,16;
%e A233761 2,4,6,12,14,20,22,26,22,12,18,32,38,28,30,32;
%e A233761 2,4,6,12,14,20,22,26,22,20,30,44,62,52,46,54,38,12,18,36,46,56,62,74,74,30,42,72,86,60,62,64;
%e A233761 Right border gives A000079.
%Y A233761 Cf. A000079, A011782, A139251, A220501, A220521, A233760, A233763, A233781.
%K A233761 nonn,tabf
%O A233761 0,3
%A A233761 _Omar E. Pol_, Dec 16 2013