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.

A005413 Number of non-vanishing Feynman diagrams of order 2n+1 for the electron-electron-photon proper vertex function in quantum electrodynamics (QED).

Table of values

n a(n)
0 1
1 1
2 7
3 72
4 891
5 12672
6 202770
7 3602880
8 70425747
9 1503484416
10 34845294582
11 872193147840
12 23469399408510
13 676090493459712
14 20771911997290116
15 678287622406488192
16 23466105907996232835
17 857623856612704266240

List of values

[1, 1, 7, 72, 891, 12672, 202770, 3602880, 70425747, 1503484416, 34845294582, 872193147840, 23469399408510, 676090493459712, 20771911997290116, 678287622406488192, 23466105907996232835, 857623856612704266240]

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

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