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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.

A329660 Numbers m such that sigma(m) is a Lucas number (A000032), where sigma(m) is the sum of divisors of m (A000203).

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 10
6 17
7 688
8 1075
9 103681
10 7860997
11 10749957121
12 115561578124838522881
13 488296733939737583689
14 489501979450313254561
15 3628116960730713370000
16 8784132317383836036997
17 8784200214538920269317
18 50755107290462736080376601
19 94426187701102977738552612783157

List of values

[1, 2, 3, 4, 10, 17, 688, 1075, 103681, 7860997, 10749957121, 115561578124838522881, 488296733939737583689, 489501979450313254561, 3628116960730713370000, 8784132317383836036997, 8784200214538920269317, 50755107290462736080376601, 94426187701102977738552612783157]

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

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