1,2

The fixed points of this sequence {n such that a(n) = n} are A110921.

Table of n, a(n) for n=1..68.

a(n) = SOD(n)*R(SOD(n)) = A007953(n)*A004086(A007953(n)).

a(19) = (1+9)*R(1+9) = 10*01 = 10*1 = 10. a(79) = 976 because (7+9)*R(7+9) = 16*61 = 976.

Cf. A004086, A007953, A110921.

Sequence in context: A003132 A062331 A069940 * A118881 A277342 A098733

Adjacent sequences: A153208 A153209 A153210 * A153212 A153213 A153214

base,easy,nonn

Jonathan Vos Post, Dec 20 2008

approved