OFFSET
1,2
COMMENTS
A007602 is a subsequence of this sequence.
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
EXAMPLE
n=135, r=3, 3*135/1*3*5=27, n=135 belongs to the sequence.
MATHEMATICA
Select[Range[1000], DigitCount[#, 10, 0]==0&&IntegerQ[(IntegerLength[#]#)/ Times@@ IntegerDigits[#]]&] (* Harvey P. Dale, Nov 04 2019 *)
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Ctibor O. Zizka, Sep 07 2010
STATUS
approved