|
| |
|
|
A087601
|
|
Primes occurring as lesser side of Heronian triangle (sides are consecutive integers, area and inradius are integers).
|
|
1
| | |
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| Next term (if exists) is greater than 10^2000. [From Max Alekseyev (maxale(AT)gmail.com), May 14 2010]
|
|
|
FORMULA
| Prime elements of A016064. Alternatively, primes p such that 3*(p+1)^2 - 12 is a square, i.e., p+1 belongs to A003500. [From Max Alekseyev (maxale(AT)gmail.com), May 14 2010]
|
|
|
EXAMPLE
| a(1)=3 because 3, 4 and 5 are sides of Heronian triangle (area is 6, inradius is 1).
|
|
|
CROSSREFS
| Cf. A001353, A016064, A087602.
Sequence in context: A081299 A117808 A002065 * A145503 A112093 A085010
Adjacent sequences: A087598 A087599 A087600 * A087602 A087603 A087604
|
|
|
KEYWORD
| more,nonn
|
|
|
AUTHOR
| Zak Seidov (zakseidov(AT)yahoo.com), Aug 07 2003
|
| |
|
|
