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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.

A128638 Expansion of q * (psi(q^3)^3 / psi(q)) / (phi(-q)^3 / phi(-q^3)) in powers of q where phi(), psi() are Ramanujan theta functions.

Table of values

n a(n)
1 1
2 5
3 19
4 61
5 174
6 455
7 1112
8 2573
9 5689
10 12102
11 24900
12 49759
13 96902
14 184408
15 343722
16 628717
17 1130418
18 2000669
19 3489788
20 6005910
21 10207688
22 17147892
23 28494120
24 46865519
25 76342903
26 123236446
27 197233723
28 313106264
29 493231830
30 771301986
31 1197743552
32 1847606573

List of values

[1, 5, 19, 61, 174, 455, 1112, 2573, 5689, 12102, 24900, 49759, 96902, 184408, 343722, 628717, 1130418, 2000669, 3489788, 6005910, 10207688, 17147892, 28494120, 46865519, 76342903, 123236446, 197233723, 313106264, 493231830, 771301986, 1197743552, 1847606573]

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

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