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.

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A102197 Iccanobirt semiprimes (7 of 15): Semiprime numbers in A102117.

Original entry on oeis.org

4, 62, 1350266, 7217219419, 662282997049, 131048548574311, 1476501837943501, 77398992743877949, 1009160086034826303, 7334718374224277375323, 267139368935075847112946291, 149235809291913788071835702010683, 1385662433217897970940689446154295119
Offset: 1

Views

Author

Jonathan Vos Post and Ray Chandler, Dec 31 2004

Keywords

Crossrefs

Cf. A001358, A102117, A102191-A102205.

Formula

a(n) = A102117(A102177(n)).

Extensions

Offset changed to 1 and a(13) from Jinyuan Wang, Aug 12 2021
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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