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.

A165223 Products of 2 successive Mersenne primes.

Original entry on oeis.org

21, 217, 3937, 1040257, 1073602561, 68718821377, 1125897758834689, 4951760154835678088235319297, 1427247692705959880439315947500961989719490561
Offset: 1

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Author

Boris Hostnik (megpplus(AT)siol.net), Sep 08 2009

Keywords

Comments

Subsequence of A144856 and of A046528. [From R. J. Mathar, Sep 17 2009]

Formula

a(n)=A000668(n)*A000668(n+1). [From R. J. Mathar, Sep 17 2009]

Extensions

Extended by R. J. Mathar, Sep 17 2009
Offset corrected by N. J. A. Sloane, Sep 20 2009

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

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