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A017129
a(n) = (8*n + 5)^5.
1
3125, 371293, 4084101, 20511149, 69343957, 184528125, 418195493, 844596301, 1564031349, 2706784157, 4437053125, 6956883693, 10510100501, 15386239549, 21924480357, 30517578125, 41615795893
OFFSET
0,1
FORMULA
a(n) = 6*a(n-1) - 15*a(n-2) + 20*a(n-3) - 15*a(n-4) + 6*a(n-5) - a(n-6); a(0)=3125, a(1)=371293, a(2)=4084101, a(3)=20511149, a(4)=69343957, a(5)=184528125. - Harvey P. Dale, Oct 10 2011
G.f.: ( 3125 + 352543*x + 1903218*x^2 + 1513438*x^3 + 159593*x^4 + 243*x^5 ) / ( (x-1)^6 ). - R. J. Mathar, May 08 2015
MATHEMATICA
(8Range[0, 20]+5)^5 (* or *) LinearRecurrence[{6, -15, 20, -15, 6, -1}, {3125, 371293, 4084101, 20511149, 69343957, 184528125}, 21] (* Harvey P. Dale, Oct 10 2011 *)
PROG
(Magma) [(8*n+5)^5: n in [0..35] ]; // Vincenzo Librandi, Jul 21 2011
CROSSREFS
Sequence in context: A016853 A016973 A017045 * A017225 A223231 A017333
KEYWORD
nonn,easy
STATUS
approved