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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.

A359017 a(n) is the index of the smallest triangular number with exactly n distinct prime factors.

Table of values

n a(n)
0 1
1 2
2 3
3 11
4 20
5 84
6 455
7 1364
8 10659
9 58695
10 254540
11 728364
12 13516580
13 133595384
14 812646120
15 5327923964
16 68971338435
17 838101203939
18 7588384207404
19 69322940121435
20 490005293940084

List of values

[1, 2, 3, 11, 20, 84, 455, 1364, 10659, 58695, 254540, 728364, 13516580, 133595384, 812646120, 5327923964, 68971338435, 838101203939, 7588384207404, 69322940121435, 490005293940084]

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

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