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A210967 Prime triples (p, q, r), p<=q<=r, such that p + q + r = 2*n + 1 and p*q*r is the minimum product. 2
2, 2, 3, 2, 2, 5, 2, 2, 7, 3, 3, 7, 2, 2, 11, 2, 2, 13, 3, 3, 13, 2, 2, 17, 2, 2, 19, 3, 3, 19, 2, 2, 23, 3, 3, 23, 3, 5, 23, 2, 2, 29, 2, 2, 31, 3, 3, 31, 3, 5, 31, 2, 2, 37, 3, 3, 37, 2, 2, 41, 2, 2, 43, 3, 3, 43, 2, 2, 47, 3, 3, 47, 3, 5, 47, 2, 2, 53, 3, 3, 53, 3, 5, 53, 2, 2, 59, 2, 2, 61, 3, 3, 61, 3, 5, 61, 2, 2, 67, 3, 3, 67, 2, 2, 71, 2, 2, 73, 3, 3, 73 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

Table of n, a(n) for n=3..113.

EXAMPLE

----------------------------------

                   p+q+r

      Triplets       =     A210968

n     (p, q, r)    2*n+1    p*q*r

----------------------------------

3     (2, 2, 3)      7       12

4     (2, 2, 5)      9       20

5     (2, 2, 7)     11       28

6     (3, 3, 7)     13       63

CROSSREFS

Cf. A005408, A210968.

Sequence in context: A175509 A213023 A068050 * A343534 A275383 A206762

Adjacent sequences:  A210964 A210965 A210966 * A210968 A210969 A210970

KEYWORD

nonn

AUTHOR

Omar E. Pol, Jun 29 2012

STATUS

approved

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Last modified July 25 12:05 EDT 2021. Contains 346289 sequences. (Running on oeis4.)