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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A222177 Number of pentagons added at n-th stage to the structure of A222176. 3
0, 1, 2, 2, 2, 4, 6, 4, 2, 4, 8, 8, 6, 10, 14, 8, 2, 4, 8, 12, 16 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Essentially the first differences of A222176.

Also number of P-toothpicks added at n-th stage to the P-toothpick structure of A222176.

First differs from A152968 at a(10).

LINKS

Table of n, a(n) for n=0..20.

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) = A222181(n+1)/5, n >= 1.

EXAMPLE

Apparently this is an irregular triangle:

0;

1;

2, 2;

2, 4, 6, 4;

2, 4, 8, 8, 6, 10, 14, 8;

2, 4, 8, 12, 16,...

CROSSREFS

Cf. A139251, A152968, A222173, A222176, A222180, A222181.

Sequence in context: A278501 A278231 A152968 * A240433 A217637 A231515

Adjacent sequences:  A222174 A222175 A222176 * A222178 A222179 A222180

KEYWORD

nonn,tabf,more

AUTHOR

Omar E. Pol, Mar 21 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 October 15 22:25 EDT 2019. Contains 328038 sequences. (Running on oeis4.)