1,1

Corresponding primes A104387, A104388, repdigits A104389. What is the next term?

Table of n, a(n) for n=1..8.

(p[n]+p[n+1])/2 = repdigit

Cf. A054268, A104387 - A104389.

Sequence in context: A055006 A139050 A043309 * A171558 A044906 A255312

Adjacent sequences: A104383 A104384 A104385 * A104387 A104388 A104389

more,nonn,base

Zak Seidov, Mar 04 2005

One more term from Giovanni Resta, Apr 05 2006

approved