[net.puzzle] sequence puzzle

jsgray@watmath.UUCP (Jan Gray) (07/19/84)

What is x in the following sequence?

10 11 12 13 14 15 16 17 20 22 24 31 x 121

(Answer in a week, unless someone spoils it.)

Jan Gray (jsgray@watmath.UUCP)   University of Waterloo   (519) 885-1211 x3870