OFFSET
1,1
EXAMPLE
a(4) = 27355372: deleting alternate digits starting from the LSD leaves 2357. Deleting the other ones leaves 7532.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Nov 25 2002
EXTENSIONS
More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 19 2003
STATUS
approved