OFFSET
1,1
COMMENTS
R(a(n)) = A086944(n).
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..300
FORMULA
a(n) = 3*(10^n-2).
MATHEMATICA
3(10^Range[20]-2) (* or *) 10*Table[FromDigits[PadRight[{2}, n, 9]], {n, 20}]+4 (* Harvey P. Dale, Jul 25 2023 *)
PROG
(Magma) [3*(10^n-2): n in [1..20]]; // Vincenzo Librandi, Aug 22 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Ray Chandler, Jul 24 2003
STATUS
approved