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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.

A139237 Second differences of even superperfect numbers A061652, divided by 2.

Table of values

n a(n)
1 5
2 18
3 1992
4 28704
5 67584
6 536641536
7 576460751229812736
8 154742503757751030292414464
9 40564509722294095963578081214464
10 42535214735633635831150802674328272896

List of values

[5, 18, 1992, 28704, 67584, 536641536, 576460751229812736, 154742503757751030292414464, 40564509722294095963578081214464, 42535214735633635831150802674328272896]

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

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