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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.

A231816 a(n) = the smallest squarefree number (A005117) with n prime factors in a 2p-1 progression.

Table of values

n a(n)
1 2
2 6
3 30
4 351137972965951
5 8596208716179446431
6 698211042943963834650959743951
7 744014385572130806167897354113929551
8 901203402294977554329263775346819632824908852456695769189267773301

List of values

[2, 6, 30, 351137972965951, 8596208716179446431, 698211042943963834650959743951, 744014385572130806167897354113929551, 901203402294977554329263775346819632824908852456695769189267773301]

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

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