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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A110792 Copies of 7,3 and 1 cyclically such that every partial concatenation is a prime.

Original entry on oeis.org

7, 3, 1111111, 777777777, 33, 11111111111111111111111111111111111111111111111111111111111111111, 7777777777777777777, 33333333333333333333, 111111111111111111111111111111111111111
Offset: 1

Views

Author

Amarnath Murthy, Aug 13 2005

Keywords

Examples

			7,73,731111111,...are all prime.

Crossrefs

Cf. A110793 (digit lengths).
Other combinations: A110774, A110776, A110778, A110780, A110782, A110788, A110790.

Extensions

More terms from Sean A. Irvine, Mar 21 2010
a(9) from Jon E. Schoenfield, Jul 11 2010

A110793 Number of digits in A110792(n).

Original entry on oeis.org

1, 1, 7, 9, 2, 65, 19, 20, 39, 54, 228, 231, 149, 630, 1641, 8794, 12907
Offset: 1

Views

Author

Amarnath Murthy, Aug 13 2005

Keywords

Crossrefs

Cf. A110774, A110775, A110776, A110777, A110778, A110780, A110781, A110782, A110783, A110788, A110789, A110790, A110791, A110792.

Extensions

a(6)-a(15) from Sean A. Irvine, Mar 22 2010
a(16) from Michael S. Branicky, Jun 23 2023
a(17) from Michael S. Branicky, Nov 19 2024
Previous Showing 11-12 of 12 results.

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

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