OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
Index entries for linear recurrences with constant coefficients, signature (21,-144,364,-240).
FORMULA
a(n) = (5*10^(n+3) - 27*6^(n+3) + 30*4^(n+3) - 8)/1080. [Yahia Kahloune, Jun 26 2013]
MATHEMATICA
CoefficientList[Series[1 / ((1 - x) (1 - 4 x) (1 - 6 x) (1 - 10 x)), {x, 0, 20}], x] (* Vincenzo Librandi, Jul 11 2013 *)
LinearRecurrence[{21, -144, 364, -240}, {1, 21, 297, 3577}, 20] (* Harvey P. Dale, May 08 2022 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved