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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A320490 Inverse Euler transform of A004106.

Original entry on oeis.org

1, 2, 0, 4, 16, 98, 766, 9982, 205574, 6546960, 352380815, 29668304472, 4303531875334, 985391751078694, 391866509413730125, 248491878411568471280, 274544424465173973822126, 488310442484985365942048784, 1513516279388226700191978571979
Offset: 0

Views

Author

N. J. A. Sloane, Oct 25 2018

Keywords

Comments

The inverse Euler transform of A004106 does not give the number of connected edge-self-dual nets. The combinatorial interpretation of this sequence is that of either a connected edge-self-dual net or a pair of distinct connected nets which are edge-dual to each other (but not edge-self-dual). - Andrew Howroyd, Jan 28 2020

Links

Crossrefs

Cf. A004106, A320491.

Formula

EULERi transform of A004106.

Extensions

Definition edited by Andrew Howroyd, Jan 26 2020
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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