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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A039506 Number of cluster primes less than 10^n.

Original entry on oeis.org

3, 23, 99, 420, 1807, 8287, 40017, 202208, 1059807, 5736717, 31911465, 182019293, 1060723057
Offset: 1

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Author

Christian G. Bower, Feb 15 1999

Keywords

Comments

The Blecksmith paper gives incorrect values of a(n) for n>8. - T. D. Noe, Jul 21 2006

Links

Crossrefs

Cf. A038133, A038134, A039507.
Cf. A121044, A121045 (cluster primes near 10^n).

Extensions

Corrected by T. D. Noe, Jul 21 2006

A121045 Least cluster prime greater than 10^n.

Original entry on oeis.org

3, 11, 101, 1013, 10141, 100153, 1000193, 10000763, 100000673, 1000000933, 10000002713, 100000005041, 1000000010489, 10000000003243
Offset: 0

Views

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), A121044.
Showing 1-2 of 2 results.

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

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