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A051858 Values of B (the even leg) of a Pythagorean triangle with A and C both prime and part of a twin prime. 4
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

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

LINKS

Table of n, a(n) for n=1..28.

CROSSREFS

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

Sequence in context: A192331 A068525 A067755 * A084709 A057394 A054719

Adjacent sequences:  A051855 A051856 A051857 * A051859 A051860 A051861

KEYWORD

nonn

AUTHOR

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

EXTENSIONS

a(11) corrected by the author, Jun 03 2002

More terms from Joshua Zucker, May 11 2006

STATUS

approved

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Last modified January 27 04:57 EST 2020. Contains 331291 sequences. (Running on oeis4.)