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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.

A121044 Greatest cluster prime less than 10^n.

Original entry on oeis.org

7, 89, 983, 9931, 99991, 999331, 9997879, 99999551, 999998693, 9999995363, 99999976319, 999999998533, 9999999954787
Offset: 1

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Author

T. D. Noe, Jul 21 2006

Keywords

Comments

These numbers are useful for generating intermediate cluster primes because the best algorithm for generating cluster primes requires starting with a known cluster prime.

Links

Crossrefs

Cf. A038134 (cluster primes), A039506 (number of cluster primes < 10^n), A121045.

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

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