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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.

A355891 Numbers k such that k = ivgenpoly(A) for some composite polynomial A in F_2[x] that satisfies the condition sigma(A) = A + 1.

Table of values

n a(n)
1 1905
2 424321
3 438065
4 443617
5 7044945
6 7899377
7 7925761
8 26397649
9 32286449
10 38123521
11 55759233

List of values

[1905, 424321, 438065, 443617, 7044945, 7899377, 7925761, 26397649, 32286449, 38123521, 55759233]

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

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