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 1-1 of 1 results.

A083749 Brilliant star numbers: semiprimes of the form 6n^2 - 6n + 1 such that both prime factors have the same number of decimal digits.

Original entry on oeis.org

121, 253, 793, 1261, 1633, 2773, 3901, 11881, 19153, 24961, 49141, 50233, 59401, 90037, 128773, 162361, 186913, 197653, 268393, 294373, 422941, 492493, 1425937, 1515037, 1663213, 1811701, 2092141, 2185273, 2601733, 3020341, 3063061
Offset: 1

Views

Author

Jason Earls, Jun 17 2003

Keywords

Comments

Brilliant numbers are A078972; "star numbers" here refers to centered 12-gonal numbers A003154, but there exist other definitions for this name. - M. F. Hasler, Nov 01 2012

Crossrefs

Intersection of A003154 and A078972, or of A218172 and A078972.
Cf. A063773.

Extensions

Definition clarified by Charles R Greathouse IV, Nov 01 2012
Showing 1-1 of 1 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.