login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A222172 Total number of ON states after n generations of cellular automaton based on pentagons starting near of the vertex of an infinite 36-degree wedge. 3
0, 1, 2, 3, 5, 8, 10, 11, 13, 17, 21, 24, 29, 36, 40, 41, 43, 47, 53, 61 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

The sequence gives the number of pentagons in the structure after n-th stage. A222173 (the first differences) gives the number of pentagons added at n-th stage.

Also P-toothpick sequence starting near of the vertex of an infinite 36-degree wedge, since each pentagon can be replaced by a P-toothpick.

For more information see A222180.

First differs from A153000 at a(9).

LINKS

Table of n, a(n) for n=0..19.

N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS

Index entries for sequences related to toothpick sequences

FORMULA

a(n) = (((A222180(n+2) - 1)/5) - 1)/2 = (A222176(n+1) - 1)/2.

a(n) = (A222180(n+2) - 6)/10. - Omar E. Pol, Nov 24 2013

CROSSREFS

Cf. A139250, A153000, A222173, A222176, A222180.

Sequence in context: A047605 A295085 A153000 * A099107 A261255 A085833

Adjacent sequences:  A222169 A222170 A222171 * A222173 A222174 A222175

KEYWORD

nonn,more

AUTHOR

Omar E. Pol, Mar 21 2013

EXTENSIONS

Name improved by Omar E. Pol, Nov 24 2013

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 16 10:03 EDT 2019. Contains 324152 sequences. (Running on oeis4.)