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A221528 Number of toothpicks or D-toothpicks added at n-th stage to the structure of A220514.

%I A221528 #8 Mar 23 2013 23:51:08
%S A221528 0,4,8,16,16,16,32,44,32,16,32,64,96,64,80,100,64,16,32,64,96,128,144,
%T A221528 168,176,80,96,176,256,160,176,212,128,16,32,64,96,128,144,176,208,
%U A221528 168,192,256,400,320,336,364,336,112,96,192,288,368,416,496
%N A221528 Number of toothpicks or D-toothpicks added at n-th stage to the structure of A220514.
%C A221528 Essentially the first differences of A220514.
%C A221528 First differs from A194435 at a(13).
%H A221528 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 A221528 <a href="/index/To#toothpick">Index entries for sequences related to toothpick sequences</a>
%F A221528 a(n) = 4*A220525(n).
%e A221528 When written as an irregular triangle begins:
%e A221528 0;
%e A221528 4;
%e A221528 8;
%e A221528 16,16;
%e A221528 16,32,44,32;
%e A221528 16,32,64,96,64,80,100,64;
%e A221528 16,32,64,96,128,144,168,176,80,96,176,256,160,176,212,128;
%e A221528 16,32,64,96,128,144,176,208,168,192,256,400,320,336,364,336,112,96,192,288,368,416,496,528,216,224,400,576,352,368, 436,256;
%Y A221528 Row lengths give 1 together with A011782.
%Y A221528 Cf. A139251, A194435, A194701, A220501, A220521, A220523, A220525.
%K A221528 nonn,tabf
%O A221528 0,2
%A A221528 _Omar E. Pol_, Mar 23 2013