login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A299478 Toothpick sequence on triangular grid with word "abcbc". 5
0, 1, 3, 7, 13, 21, 27, 33, 43, 59, 79, 91, 101, 117, 137, 169, 193, 215, 249, 285, 325, 341, 355, 375, 399, 439, 471, 503, 547, 595, 659, 707, 749, 807, 877, 981, 1055, 1115, 1193, 1271, 1351, 1375, 1389, 1409, 1433, 1473, 1509, 1549, 1599, 1651, 1723 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

a(n) gives the number of toothpicks of length 2 in the structure after n-th stage.

A299479 (the first differences) gives the number of toothpicks added at n-th stage.

For more information about the "word" of a cellular automaton see A296612.

LINKS

Table of n, a(n) for n=0..50.

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

Index entries for sequences related to cellular automata

Index entries for sequences related to toothpick sequences

CROSSREFS

Cf. A299479 (first differences).

Cf. A160120 (word "a"), A139250 (word "ab"), A296510 (word "abc"), A299476 (word "abcb").

Sequence in context: A100531 A032409 A073896 * A299476 A077853 A256588

Adjacent sequences:  A299475 A299476 A299477 * A299479 A299480 A299481

KEYWORD

nonn,more

AUTHOR

Omar E. Pol, Feb 11 2018

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 February 20 20:31 EST 2020. Contains 332084 sequences. (Running on oeis4.)