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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A098091 Graded dimension of the space of invariant bilinear forms on the free pre-Lie algebra on one generator.

Original entry on oeis.org

1, 1, 4, 7, 17, 36, 88, 196, 481, 1148, 2838, 7020, 17708, 44837, 114971, 296457
Offset: 5

Views

Author

F. Chapoton, Sep 14 2004

Keywords

Comments

The sequence starts at index 5 because the previous terms vanish.

Crossrefs

This is related in some sense to A000081.
Cf. A051573, A123256.

Formula

It seems that a(n+1) = A000081(n) - A051573(n). - Andrey Zabolotskiy, Aug 05 2024
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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