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.

A138517 Expansion of (phi(-q^5) / phi(-q))^2 in powers of q where phi() is a Ramanujan theta function.

Table of values

n a(n)
0 1
1 4
2 12
3 32
4 76
5 164
6 336
7 656
8 1228
9 2228
10 3932
11 6768
12 11408
13 18872
14 30688
15 49152
16 77644
17 121096
18 186684
19 284720
20 429916
21 643168
22 953904
23 1403312
24 2048784
25 2969764
26 4275656
27 6116480
28 8696864
29 12294680
30 17285776
31 24176288
32 33645132

List of values

[1, 4, 12, 32, 76, 164, 336, 656, 1228, 2228, 3932, 6768, 11408, 18872, 30688, 49152, 77644, 121096, 186684, 284720, 429916, 643168, 953904, 1403312, 2048784, 2969764, 4275656, 6116480, 8696864, 12294680, 17285776, 24176288, 33645132]

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

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