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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.

A118445 Number of tree-rooted maps of genus 1 with n edges: rooted maps on the torus with a distinguished spanning tree.

Table of values

n a(n)
2 1
3 25
4 490
5 8820
6 152460
7 2576574
8 42942900
9 709171320
10 11636856660
11 190068658780
12 3093732938296
13 50222937310000
14 813611584422000
15 13158602740363500
16 212528020730913000
17 3428785401125396400
18 55266606794455402500
19 890117467077758188500

List of values

[1, 25, 490, 8820, 152460, 2576574, 42942900, 709171320, 11636856660, 190068658780, 3093732938296, 50222937310000, 813611584422000, 13158602740363500, 212528020730913000, 3428785401125396400, 55266606794455402500, 890117467077758188500]

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

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