OFFSET
1,1
EXAMPLE
a(4) = 2111 staring with a(3) = 211 and a(5) = 22111 ending in a(4) = 2111.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Amarnath Murthy, Mar 27 2002
EXTENSIONS
More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Mar 30 2003
STATUS
approved