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.

A309553 Imperfect numbers of the form 2^(2^k-1)*F_1*F_2*...*F_(k-1), where F is a Fermat number.

Table of values

n a(n)
1 40
2 10880
3 715816960
4 3074457344902430720

List of values

[40, 10880, 715816960, 3074457344902430720]

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

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