1,2

Table of n, a(n) for n=1..9.

For n = 2, A123112(2)^2 = 6^2 = 36 = 17 + 19 = prime(7) + prime(8). Thus a(2) = 7.

Cf. A123112.

Sequence in context: A058795 A027459 A329108 * A027531 A155459 A155631

Adjacent sequences: A162157 A162158 A162159 * A162161 A162162 A162163

more,nonn

Alexander Adamchuk, Jun 26 2009

Definition brushed, a(6) added, a(7) from D. Johnson - R. J. Mathar, Sep 16 2009

a(8) and a(9) from Max Alekseyev, Sep 18 2009

approved