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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A378673 Numbers of not uniquely embeddable trees on n vertices.

Original entry on oeis.org

0, 0, 0, 0, 0, 0, 1, 4, 16, 49, 140, 390, 1039, 2724, 7058, 18239, 46964, 121322, 314155, 817407, 2136273, 5611821, 14811062, 39275823, 104603284, 279746752, 751001466, 2023355751, 5469448788, 14830713681, 40330618790, 109972131832, 300628497213, 823779154305, 2262365724468
Offset: 1

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Author

Eric W. Weisstein, Dec 03 2024

Keywords

Crossrefs

Cf. A378672 (uniquely embeddable trees).
Cf. A372853 (uniquely embeddable planar connected graphs).
Cf. A000055 (trees).

Formula

a(n) = A000055(n) - A378672(n).

Extensions

a(13) onwards from Andrew Howroyd, Jun 08 2025
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