OFFSET
1,2
EXAMPLE
x(3) = 123, y(3) = 321
c(3) = 32123, d(3) = 12321.
a(3) = c(3) - d(3) = 19802.
PROG
(PARI) { for(n=1, 20, if(n==1, x=1; y=1; l=1; ln=1; ln=length(Str(n)); x=x*10^ln+n; y=n*10^l+y; l=l+ln; ); print((floor(y/10)*10^l + x)-(floor(x/10)*10^l + y)); ); }
CROSSREFS
KEYWORD
base,easy,sign
AUTHOR
Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 09 2003
EXTENSIONS
More terms from Ray Chandler, Jul 23 2003
STATUS
approved