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.

Showing 1-2 of 2 results.

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

Views

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

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

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), A121045.
Showing 1-2 of 2 results.

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

Content is available under The OEIS End-User License Agreement.