cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A211974 Number of E-toothpicks added at n-th stage in the structure of A161336.

Original entry on oeis.org

0, 1, 1, 1, 3, 1, 3, 3, 3, 5, 3, 5, 7, 1, 3, 3, 5, 9, 5, 13, 7, 9, 13, 7, 11, 13, 3, 7, 7, 9, 15, 11, 21, 15, 15, 17, 11, 13, 15, 15, 15, 9, 11, 19, 13, 21, 21, 17, 17, 23, 17, 27, 17, 19, 27, 21, 27, 19, 17, 17, 21, 31, 31, 25, 23
Offset: 0

Views

Author

Omar E. Pol, Dec 15 2012

Keywords

Comments

Essentially the first differences of A161336.

Links

Crossrefs

Cf. A139250, A139251, A161328, A161330, A213360, A211976.

Formula

a(n) = A161331(n+1)/6, n >= 1.

A294961 a(n) is the number of E-toothpicks added at n-th stage in the structure of the snowflake cellular automaton of A294960.

Original entry on oeis.org

2, 6, 6, 6, 6, 18, 6, 18, 18, 18, 6, 18, 30, 18, 30, 54, 18, 42, 30, 42, 18, 42, 42, 54, 66
Offset: 1

Views

Author

Omar E. Pol, Feb 10 2018

Keywords

Links

Crossrefs

First differences of A294960.
Cf. A139251, A161328, A161329, A161330, A161331.
Previous Showing 11-12 of 12 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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