A253771 First differences of A253770.

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

Offset

0,2

Comments

Number of cells turned "ON" at n-th stage of cellular automaton of A253770.

Also 6 times the number of Y-toothpicks added at n-th stage in the Y-toothpick 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 A077630 A361730

Adjacent sequences: A253768 A253769 A253770 * A253772 A253773 A253774

Keyword

nonn,tabf

Author

Omar E. Pol, Jan 13 2015

Status

approved