

A170889


First differences of toothpick sequence A170888.


4



0, 1, 2, 4, 4, 4, 6, 10, 8, 4, 6, 10, 10, 12, 20, 26, 16, 4, 6, 10, 10, 12, 20, 26, 18, 12, 20, 28, 30, 42, 64, 66, 32, 4, 6, 10, 10, 12, 20, 26, 18, 12, 20, 28, 30, 42, 64, 66, 34, 12, 20, 28, 30, 42, 64, 68, 46, 42, 66, 84, 100, 146, 192, 162, 64, 4, 6, 10, 10, 12, 20, 26, 18, 12
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OFFSET

0,3


LINKS

Table of n, a(n) for n=0..73.
David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata
N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS


EXAMPLE

From Omar E. Pol, Jan 30 2013 (Start):
Written as an irregular triangle:
0;
1;
2;
4,4;
4,6,10,8;
4,6,10,10,12,20,26,16;
4,6,10,10,12,20,26,18,12,20,28,30,42,64,66,32;
4,6,10,10,12,20,26,18,12,20,28,30,42,64,66,34,12,20,28,30,42,64,68,46,42,66,84,100,146,192,162,64;
(End)


CROSSREFS

Cf. A139250, A139251, A160407, A170887, A170888, A170891, A170893.
Sequence in context: A201629 A033827 A008217 * A182839 A043552 A035545
Adjacent sequences: A170886 A170887 A170888 * A170890 A170891 A170892


KEYWORD

nonn,tabf


AUTHOR

Omar E. Pol, Jan 09 2010


EXTENSIONS

Terms beyond a(10) from R. J. Mathar, Jan 25 2010


STATUS

approved



