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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.

A171117 A particular case of Gromov-Witten numbers: a(n) is the number of complex rational curves of degree n and genus 0 in CP^3 passing through 2n given points.

Table of values

n a(n)
1 1
2 0
3 1
4 4
5 105
6 2576
7 122129
8 7397760
9 629336977
10 68265049600
11 9386419113537
12 1583207240397824
13 322519291535862713
14 77985053716765181952
15 22094670475785827572945
16 7249172440569540585914368
17 2727206213196927179246863137
18 1166222035906526210266584842240

List of values

[1, 0, 1, 4, 105, 2576, 122129, 7397760, 629336977, 68265049600, 9386419113537, 1583207240397824, 322519291535862713, 77985053716765181952, 22094670475785827572945, 7249172440569540585914368, 2727206213196927179246863137, 1166222035906526210266584842240]

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

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