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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A346564 Number of compositions (ordered partitions) of 3^n into powers of 3.

Original entry on oeis.org

1, 2, 20, 26426, 61390791862967, 769671787836269530451291677988751813890576
Offset: 0

Views

Author

Ilya Gutkovskiy, Jul 23 2021

Keywords

Comments

The next term is too large to include.

Links

Crossrefs

Cf. A000244, A078125, A078932, A248377, A337990, A346565.

Programs

  • Mathematica
    Table[SeriesCoefficient[1/(1 - Sum[x^(3^k), {k, 0, n}]), {x, 0, 3^n}], {n, 0, 5}]

Formula

a(n) = [x^(3^n)] 1 / (1 - Sum_{k>=0} x^(3^k)).
a(n) = A078932(A000244(n)).
Showing 1-1 of 1 results.

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

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