OFFSET
1,1
COMMENTS
a(1) - a(5) computed by M. F. Hasler, Feb 02 2008
EXAMPLE
232564 is an SPN but is not in this sequence since it can be obtained from the SPN 32564 by prefixing the digit 2.
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
Eric Angelini, Jul 05 2005
STATUS
approved