1,1

No more terms through 10^9.

Table of n, a(n) for n=1..18.

The sum of the first 14 odd composites, when written in base 3, is the palindrome 201102, so 14 is in the sequence.

Cf. A058848 (palindromic in base 10).

Sequence in context: A236928 A064708 A064709 * A046712 A162823 A020171

Adjacent sequences: A118126 A118127 A118128 * A118130 A118131 A118132

more,nonn,base

Ryan Propper, May 12 2006

approved