OFFSET
1,3
COMMENTS
Equivalently, the digits of a(n) are a nontrivial composition of n and n divides a(n).
Conjecture: zero occurs only for indices which are multiples of 10 apart from 1, 2, 5 and 11. (a(n) = 0 only for n = 1,2,5,11 or n = 10k.)
LINKS
Chai Wah Wu, Table of n, a(n) for n = 1..100
EXAMPLE
a(8) = 152 is a multiple of 8; a(10) = 0, since every multiple of 10 includes a 0.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Nov 20 2002
EXTENSIONS
Edited and extended by Franklin T. Adams-Watters, Jun 14 2006
a(44) corrected by Chai Wah Wu, Mar 17 2016
STATUS
approved