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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.

A087977 a(n) is the first term in the first chain of at least n consecutive numbers each having exactly four distinct prime factors.

Table of values

n a(n)
1 210
2 7314
3 37960
4 134043
5 357642
6 1217250
7 1217250
8 14273478
9 44939642
10 76067298
11 163459742
12 547163235
13 2081479430
14 2771263512
15 11715712410
16 17911205580
17 56608713884
18 118968284928
19 118968284928
20 585927201062
21 585927201062
22 585927201062
23 585927201062

List of values

[210, 7314, 37960, 134043, 357642, 1217250, 1217250, 14273478, 44939642, 76067298, 163459742, 547163235, 2081479430, 2771263512, 11715712410, 17911205580, 56608713884, 118968284928, 118968284928, 585927201062, 585927201062, 585927201062, 585927201062]

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

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