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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.

A306402 Number of coalescent histories for a matching completely symmetric gene tree and completely symmetric species tree with 2^n leaves.

Table of values

n a(n)
0 1
1 1
2 4
3 169
4 1020100
5 270062420147776
6 686954819460520804489954417158400
7 3171571350979001722602021784038902498684386645982829438130935832126653601

List of values

[1, 1, 4, 169, 1020100, 270062420147776, 686954819460520804489954417158400, 3171571350979001722602021784038902498684386645982829438130935832126653601]

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

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