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.

Showing 1-3 of 3 results.

A161210 Toothpick sequence starting at the outside corner of an infinite cube from which protrudes a half toothpick.

Original entry on oeis.org

0, 1, 3, 7, 14, 21, 28
Offset: 0

Views

Author

Omar E. Pol, Jun 06 2009

Keywords

Comments

The sequence gives the number of toothpicks after n rounds. A161211 (the first differences) gives the number added at the n-th round.
This structure is a three-dimensional version of the toothpick structure of A153006.
Toothpicks are placed following a rotation of axes: x,y,z,x,y,z,... and so on.
See A139250 and A160160 for more information about the toothpick sequences.

Links

Crossrefs

Cf. A139250, A152980, A153006, A160160, A161211, A161212, A161214, A161216.

A161212 a(n) = A161210(n)*2.

Original entry on oeis.org

0, 2, 6, 14, 28, 42, 56
Offset: 0

Views

Author

Omar E. Pol, Jun 06 2009

Keywords

Links

Crossrefs

Cf. A139250, A152980, A153006, A160160, A161210, A161213, A161214, A161216.

A161214 a(n) = A161210(n)*3.

Original entry on oeis.org

0, 3, 9, 21, 42, 63, 84
Offset: 0

Views

Author

Omar E. Pol, Jun 06 2009

Keywords

Links

Crossrefs

Cf. A139250, A152980, A153006, A160160, A161210, A161212, A161215, A161216.
Showing 1-3 of 3 results.

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