login
A017377
a(n) = 10*n + 9.
41
9, 19, 29, 39, 49, 59, 69, 79, 89, 99, 109, 119, 129, 139, 149, 159, 169, 179, 189, 199, 209, 219, 229, 239, 249, 259, 269, 279, 289, 299, 309, 319, 329, 339, 349, 359, 369, 379, 389, 399, 409, 419, 429, 439, 449, 459, 469, 479, 489, 499, 509, 519, 529, 539
OFFSET
0,1
COMMENTS
Numbers k such that k^k ends with 9. - Bruno Berselli, Dec 11 2018
FORMULA
a(n) = 10*n + 9; a(n) = 2*a(n-1) - a(n-2). - Vincenzo Librandi, May 29 2011
G.f.: ( 9+x ) / (x-1)^2 . - R. J. Mathar, Oct 16 2015
MATHEMATICA
Range[9, 1000, 10] (* Vladimir Joseph Stephan Orlovsky, May 28 2011 *)
PROG
(Magma) [10*n+9: n in [0..60]]; // Vincenzo Librandi, May 29 2011
(PARI) a(n)=10*n+9 \\ Charles R Greathouse IV, Feb 12 2017
CROSSREFS
KEYWORD
nonn,easy
STATUS
approved