A138226 Number of triples (p,q,r) of primes with p<q<r<=prime(n), p+q>r, q+r>p and r+p>q.

0, 0, 0, 1, 2, 5, 9, 16, 25, 34, 48, 62, 82, 109, 142, 176, 213, 259, 308, 367, 438, 512, 598, 689, 778, 881, 1000, 1134, 1286, 1452, 1595, 1757, 1930, 2126, 2319, 2533, 2758, 2996, 3260, 3533, 3820, 4132, 4444, 4786, 5155, 5554, 5935, 6309, 6716, 7158, 7632

Offset

1,5

Comments

Partial sums of A138225.

Links

Table of n, a(n) for n=1..51.

Crossrefs

Sequence in context: A381294 A360419 A282044 * A175287 A346822 A284917

Adjacent sequences: A138223 A138224 A138225 * A138227 A138228 A138229

Keyword

nonn

Author

Reinhard Zumkeller, Mar 06 2008

Status

approved