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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.

A338534 a(n) is the smallest number k whose symmetric representation of sigma(k) consists of n regions (or parts) and whose areas are strictly decreasing towards the diagonal.

Table of values

n a(n)
1 1
2 3
3 9
4 21
5 81
6 147
7 441
8 903
9 2499
10 6069
11 15351
12 29095
13 80367
14 153065
15 366025
16 643885

List of values

[1, 3, 9, 21, 81, 147, 441, 903, 2499, 6069, 15351, 29095, 80367, 153065, 366025, 643885]

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

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