OFFSET
1,1
EXAMPLE
a(12) = 2112, a(1235) = 53211235
MATHEMATICA
Table[10^IntegerLength[n] IntegerReverse[n]+n, {n, 40}] (* Harvey P. Dale, Mar 14 2023 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Amarnath Murthy, Jun 07 2002
STATUS
approved