0,6

The first five terms of this sequence correspond to known Fermat primes.

Table of n, a(n) for n=0..10.

Cf. A090872, A090874, A090875, A129614, A129615.

Sequence in context: A013756 A078185 A096224 * A248734 A259210 A013802

Adjacent sequences: A129610 A129611 A129612 * A129614 A129615 A129616

nonn

Farideh Firoozbakht, May 13 2007, May 16 2007

a(10) from Jens Kruse Andersen, Jun 05 2010

approved