cp's OEIS Frontend

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.

A356821 Lucas-Carmichael numbers k that have an abundancy index sigma(k)/k that is larger than the abundancy indices of all smaller Lucas-Carmichael numbers.

Table of values

n a(n)
1 399
2 6304359999
3 408598269695
4 517270926095
5 20203946790335

List of values

[399, 6304359999, 408598269695, 517270926095, 20203946790335]

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

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