A122654 Smallest prime p such that p^2 equal to the sum of 2n+1 consecutive odd primes, or 1 if such a prime does not exist.

7, 31, 13, 29, 107, 293, 821, 379, 293, 83, 31, 241, 37, 653, 43, 211, 73, 1123, 311, 1567, 1607, 929, 233, 4801, 601, 5087, 307, 163, 709, 1021, 983, 191, 1327, 241, 5443, 157, 277, 151, 743, 4651, 32371, 1493, 1373, 8521, 683, 7919, 947, 1279, 10847, 1613

Offset

1,1

Links

Table of n, a(n) for n=1..50.

Example

a(1) = 7 because A122560[1] = 7 and 7^2 = 49 = 13 + 17 + 19 = p(6) + p(7) + p(8).

Crossrefs

Cf. A122560, A070934.

Sequence in context: A156347 A221402 A065916 * A184121 A167768 A103630

Adjacent sequences: A122651 A122652 A122653 * A122655 A122656 A122657

Keyword

nonn

Author

Alexander Adamchuk, Sep 21 2006

Extensions

More terms from Don Reble, Sep 22 2006

Status

approved