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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.

A004136 Additive bases: a(n) is the least integer k such that in the cyclic group Z_k there is a subset of n elements all pairs (of not necessarily distinct elements) of which add up to a different sum (in Z_k).

Table of values

n a(n)
1 1
2 3
3 7
4 13
5 21
6 31
7 48
8 57
9 73
10 91
11 120
12 133
13 168
14 183
15 255
16 255
17 273
18 307

List of values

[1, 3, 7, 13, 21, 31, 48, 57, 73, 91, 120, 133, 168, 183, 255, 255, 273, 307]

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

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