OFFSET
1,1
COMMENTS
A subsequence of A087984.
LINKS
N. J. A. Sloane, Table of n, a(n) for n = 1..1140 [These are the distinct products of three two-digit primes]
D. Applegate, M. LeBrun and N. J. A. Sloane, Dismal Arithmetic [Note: we have now changed the name from "dismal arithmetic" to "lunar arithmetic" - the old name was too depressing]
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Aug 14 2010
STATUS
approved