OFFSET
1,1
REFERENCES
S. S. Gupta, EPRNs, Science Today, Feb. 1987, India.
LINKS
Chai Wah Wu, Table of n, a(n) for n = 1..126
Shyam Sunder Gupta, EPRN Numbers.
EXAMPLE
1239016098321 = 1113111 * 1113111 = 1022121 * 1212201, etc.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Shyam Sunder Gupta, Jun 07 2003
EXTENSIONS
Corrected by Hans Havermann, Feb 13 2012
a(4)-a(14) (including four found by Hans Havermann) from Donovan Johnson, Feb 18 2012
Definition corrected by N. J. A. Sloane, Aug 01 2019
STATUS
approved