OFFSET
1,3
EXAMPLE
a(1)=1 as 10 is the only 2-digit multiple of 1 whose digits sum to 1, while a(3)=3 as the multiples 12, 21 and 30 have the property.
CROSSREFS
KEYWORD
base,full,nonn,fini
AUTHOR
Ian Duff, Jun 08 2008
STATUS
approved