1,2

a(4)=13 since A068809(4)=49, whose digit-sum is 4+9=13.

Cf. A068809, A068950, A068952, A069324.

Adjacent sequences: A068946 A068947 A068948 this_sequence A068950 A068951 A068952

Sequence in context: A010412 A033662 A136640 this_sequence A010397 A020684 A093410

nonn,base

Francois Jooste (phukraut(AT)hotmail.com), Mar 15 2002