1,2

Table of n, a(n) for n=1..49.

79 is in the sequence because (1) it is a lucky number and (2) the product of its digits 7*9=63 is also a lucky number.

Cf. A000959.

Sequence in context: A032664 A166733 A172987 * A279617 A199919 A178207

Adjacent sequences: A118553 A118554 A118555 * A118557 A118558 A118559

base,nonn

Luc Stevens (lms022(AT)yahoo.com), May 07 2006

approved