OFFSET
1,1
COMMENTS
Sequence is infinite as (10^k - 1)/3 is always a member for k >1. (10^k-1)/3 = {(10^k -1)/9}*{10^k -1}^(1/2).
EXAMPLE
6 = (4*9)^(1/2), 121 = (11*1331)^(1/2).
4444 = (2222*8888)^(1/2)
4664 = (25652*848)^(1/2)
4884 = (26862*888)^(1/2)
6006 = (4004*9009)^(1/2)
6336 = (405504*99)^(1/2)
6666 = (4444*9999)^(1/2)
10201 = (101*1030301)^(1/2)
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Apr 25 2003
EXTENSIONS
More terms from Deepan Majmudar (deepan.majmudar(AT)hp.com), Nov 29 2004
STATUS
approved