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.

A128640 Expansion of (1/3) * (c(q^2)^2 / c(q)) / (b(q^2)^2 / b(q)) in powers of q where b(), c() are cubic AGM theta functions.

Table of values

n a(n)
1 1
2 -4
3 10
4 -20
5 39
6 -76
7 140
8 -244
9 415
10 -696
11 1140
12 -1820
13 2861
14 -4448
15 6816
16 -10292
17 15372
18 -22756
19 33356
20 -48408
21 69683
22 -99600
23 141312
24 -199036
25 278557
26 -387608
27 536230
28 -737632
29 1009464
30 -1374888
31 1863764
32 -2514868
33 3378948
34 -4521672
35 6027000
36 -8002676

List of values

[1, -4, 10, -20, 39, -76, 140, -244, 415, -696, 1140, -1820, 2861, -4448, 6816, -10292, 15372, -22756, 33356, -48408, 69683, -99600, 141312, -199036, 278557, -387608, 536230, -737632, 1009464, -1374888, 1863764, -2514868, 3378948, -4521672, 6027000, -8002676]