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A147977
a(n) = 6^n-5^n-4^n-3^n-2^n-1.
4
-4, -9, -19, -9, 317, 3351, 26141, 183111, 1216637, 7842231, 49591901, 309595431, 1915328957, 11771279511, 71987413661, 438579282951, 2664183937277, 16146410851191, 97676152243421, 590010212989671, 3559688008961597
OFFSET
1,1
FORMULA
G.f.: x*(1524*x^5-2700*x^4+1755*x^3-530*x^2+75*x-4)/((x-1)*(2*x-1)*(3*x-1)*(4*x-1)*(5*x-1)*(6*x-1)). [Colin Barker, Oct 29 2012]
MATHEMATICA
lst={}; Do[p=6^n-5^n-4^n-3^n-2^n-1^n; AppendTo[lst, p], {n, 0, 5!}]; lst
Table[6^n-5^n-4^n-3^n-2^n-1, {n, 0, 20}] (* or *) LinearRecurrence[{21, -175, 735, -1624, 1764, -720}, {-4, -9, -19, -9, 317, 3351}, 30] (* Harvey P. Dale, Jan 17 2017 *)
CROSSREFS
KEYWORD
sign,easy
AUTHOR
STATUS
approved