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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.

A004009 Expansion of Eisenstein series E_4(q) (alternate convention E_2(q)); theta series of E_8 lattice.

Table of values

n a(n)
0 1
1 240
2 2160
3 6720
4 17520
5 30240
6 60480
7 82560
8 140400
9 181680
10 272160
11 319680
12 490560
13 527520
14 743040
15 846720
16 1123440
17 1179360
18 1635120
19 1646400
20 2207520
21 2311680
22 2877120
23 2920320
24 3931200
25 3780240
26 4747680
27 4905600
28 6026880

List of values

[1, 240, 2160, 6720, 17520, 30240, 60480, 82560, 140400, 181680, 272160, 319680, 490560, 527520, 743040, 846720, 1123440, 1179360, 1635120, 1646400, 2207520, 2311680, 2877120, 2920320, 3931200, 3780240, 4747680, 4905600, 6026880]

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

Content is available under The OEIS End-User License Agreement.