A024123 a(n) = 10^n - n^9.

1, 9, -412, -18683, -252144, -1853125, -9077696, -30353607, -34217728, 612579511, 9000000000, 97642052309, 994840219648, 9989395500627, 99979338953216, 999961556640625, 9999931280523264, 99999881412123503

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..300

Index entries for linear recurrences with constant coefficients, signature (20,-145,570,-1410,2352,-2730,2220,-1245,460,-101,10).

Mathematica

Table[10^n-n^9, {n, 0, 30}] (* or *) LinearRecurrence[ {20, -145, 570, -1410, 2352, -2730, 2220, -1245, 460, -101, 10}, {1, 9, -412, -18683, -252144, -1853125, -9077696, -30353607, -34217728, 612579511, 9000000000}, 30] (* Harvey P. Dale, Feb 06 2014 *)

Prog

(Magma) [10^n-n^9: n in [0..20]]; // Vincenzo Librandi, Jul 01 2011
(PARI) a(n)=10^n-n^9 \\ Charles R Greathouse IV, Jul 01 2011

Crossrefs

Sequence in context: A035024 A179433 A091061 * A218140 A292073 A232249

Adjacent sequences: A024120 A024121 A024122 * A024124 A024125 A024126

Keyword

sign,easy

Author

N. J. A. Sloane

Status

approved