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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.

A378470 a(n) is the smallest number k for which the width pattern of the symmetric representation of sigma(k), SRS(k), consists of two unimodal parts of maximum width n.

Table of values

n a(n)
1 3
2 78
3 10728
4 28920
5 53752896
6 4157280
7 278628512256
8 90323520
9 1658908800
10 21499810560
11 7487812494923563008
12 13005699840
13 155267279705546496147456
14 111451576596480
15 8599694054400
16 468208581120
17 4172630516011611848266349543424
18 5202323481600
19 21630916595004029113587563614961664
20 67421367982080

List of values

[3, 78, 10728, 28920, 53752896, 4157280, 278628512256, 90323520, 1658908800, 21499810560, 7487812494923563008, 13005699840, 155267279705546496147456, 111451576596480, 8599694054400, 468208581120, 4172630516011611848266349543424, 5202323481600, 21630916595004029113587563614961664, 67421367982080]

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

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