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.

A099723 Nonprime-power sigma-perfect numbers: numbers n such that NPPSigma(n)=2*n, where, if n=Product p_i^r_i then NPPSigma(n)=Product{Sum p_i^s_i, s_i is not a prime number, 0<=s_i<=r_i}.

Table of values

n a(n)
1 6
2 4560
3 13770
4 111552
5 256011840

List of values

[6, 4560, 13770, 111552, 256011840]

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

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