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A162777 a(n) = A153003(n)-A153006(n). 1
0, 0, 1, 1, 1, 3, 5, 3, 1, 3, 5, 5, 7, 13, 15, 7, 1, 3, 5, 5, 7, 13, 15, 9, 7, 13, 17, 19, 29, 43, 39, 15, 1, 3, 5, 5, 7, 13, 15, 9, 7, 13, 17, 19, 29, 43, 39, 17, 7, 13 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

COMMENTS

The main entry for this sequence is the toothpick sequence A139250.

LINKS

Table of n, a(n) for n=0..49.

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

FORMULA

Observation: It appears that a(2^i)=1, i>0 and a(2^i-1)=2^(i-1)-1, i>0.

EXAMPLE

If written as a triangle:

0;

0;

1,1;

1,3,5,3;

1,3,5,5,7,13,15,7;

1,3,5,5,7,13,15,9,7,13,17,19,29,43,39,15;

...

Rows converge to A162779.

CROSSREFS

Cf. A139250, A152980, A153003, A153004, A153006, A162779.

Sequence in context: A243533 A239730 A287765 * A241014 A173454 A023505

Adjacent sequences:  A162774 A162775 A162776 * A162778 A162779 A162780

KEYWORD

more,nonn,tabf

AUTHOR

Omar E. Pol, Jul 23 2009

STATUS

approved

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Last modified February 22 08:02 EST 2018. Contains 299447 sequences. (Running on oeis4.)