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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.

A051858 Values of B (the even leg) of a Pythagorean triangle with A and C both prime and part of a twin prime.

Original entry on oeis.org

4, 12, 60, 180, 420, 5100, 60900, 135720, 161880, 163020, 218460, 595140, 1108560, 2574180, 2740140, 3248700, 3535140, 3723720, 3729180, 8197200, 13933920, 20218440, 23605320, 28569240, 33874680, 47248920, 68667480, 69372420
Offset: 1

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Author

Stuart M. Ellerstein (ellerstein(AT)aol.com), Dec 14 1999

Keywords

Comments

All terms of the sequence must be part of a Pythagorean triple of the form (2u-1), 2u*(u-1), (2u^2 - 2u + 1). - Joshua Zucker, May 11 2006

Crossrefs

See A051642 for the A's and A051859 for the C's.

Extensions

a(11) corrected by the author, Jun 03 2002
More terms from Joshua Zucker, May 11 2006

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