A262617 First differences of A256266.

0, 6, 12, 6, 24, 18, 12, 6, 48, 42, 36, 30, 24, 18, 12, 6, 96, 90, 84, 78, 72, 66, 60, 54, 48, 42, 36, 30, 24, 18, 12, 6, 192, 186, 180, 174, 168, 162, 156, 150, 144, 138, 132, 126, 120, 114, 108, 102, 96, 90, 84, 78, 72, 66, 60, 54, 48, 42, 36, 30, 24, 18, 12, 6, 384, 378, 372, 366, 360, 354, 348, 342, 336, 330, 324, 318

Offset

0,2

Comments

Number of cells turned ON at n-th stage of the cellular automaton of A256266.

Links

Table of n, a(n) for n=0..75.

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 * A080079(n), n >= 1.

Example

With the terms written as an irregular triangle in which the row lengths are the terms of A011782 the sequence begins:
0;
6;
12, 6;
24, 18, 12, 6;
48, 42, 36, 30, 24, 18, 12, 6;
96, 90, 84, 78, 72, 66, 60, 54, 48, 42, 36, 30, 24, 18, 12, 6;
...
Apart from the initial zero the rows list the initial terms of the positive multiples of 6 in decreasing order.

Prog

(PARI) a(n) = if(n==0, 0, -6*n+12*2^floor(log(n)/log(2)));
vector(100, n, a(n-1)) \\ Altug Alkan, Oct 04 2015

Crossrefs

Cf. A008588, A011782, A080079, A255748, A256257, A256266.

Sequence in context: A315776 A343052 A050496 * A303226 A360877 A295122

Adjacent sequences: A262614 A262615 A262616 * A262618 A262619 A262620

Keyword

nonn,tabf,easy

Author

Omar E. Pol, Oct 02 2015

Status

approved