0,1

Table[ Plus @@ IntegerDigits[5^(10^n)], {n, 0, 8}]

Cf. A119666, A124307.

Sequence in context: A157794 A001656 A087632 this_sequence A124545 A125729 A144069

Adjacent sequences: A124303 A124304 A124305 this_sequence A124307 A124308 A124309

base,nonn

Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 30 2006