

A253771


First differences of A253770.


2



0, 6, 18, 18, 54, 18, 54, 54, 126, 54, 54, 54, 126, 90, 126, 162, 306, 162, 54, 54, 126, 90, 126, 162, 306, 198, 126, 162, 306, 306, 342, 414, 702, 486, 126, 54, 126, 90, 126, 162, 306, 198, 126, 162, 306, 306, 342, 414, 702, 522, 198, 162
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OFFSET

0,2


COMMENTS

Number of cells turned "ON" at nth stage of cellular automaton of A253770.
Also 6 times the number of Ytoothpicks added at nth stage in the Ytoothpick structure of A160120.


LINKS

Table of n, a(n) for n=0..51.
N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS
Index entries for sequences related to cellular automata


FORMULA

a(n) = 6*A160121(n).


EXAMPLE

Positive terms can be written as a triangle in which row lengths is A011782 as shown below:
6;
18;
18, 54;
18, 54,54,126;
54, 54,54,126,90,126,162,306;
162, 54,54,126,90,126,162,306,198,126,162,306,306,342,414,702;
486,126,54,126,90,126,162,306,198,126,162,306,306,342,414,702,522,198,162,...


CROSSREFS

Cf. A139251, A147582, A151724, A160121, A161645, A182633, A250301, A253770.
Sequence in context: A174904 A074390 A255617 * A223218 A045857 A074791
Adjacent sequences: A253768 A253769 A253770 * A253772 A253773 A253774


KEYWORD

nonn,tabf


AUTHOR

Omar E. Pol, Jan 13 2015


STATUS

approved



