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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.

A188937 Let G be the class group of the imaginary quadratic field Q(sqrt(-A188661(n))); the 2-Sylow subgroup of G is cyclic of order 2^a(n).

Table of values

n a(n)
1 2
2 3
3 3
4 4
5 5
6 6
7 8
8 9
9 6
10 10
11 7
12 6
13 9
14 8
15 10

List of values

[2, 3, 3, 4, 5, 6, 8, 9, 6, 10, 7, 6, 9, 8, 10]

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