OFFSET
1,1
EXAMPLE
a(1)= 19 = 19
a(2)= 19*29 = 551
a(3)= 19*29*59 = 32509
a(4)= 19*29*59*79 = 2568211
CROSSREFS
KEYWORD
nonn
AUTHOR
Jorge Coveiro, Apr 11 2004
STATUS
approved