A016768 (3*n)^4.

0, 81, 1296, 6561, 20736, 50625, 104976, 194481, 331776, 531441, 810000, 1185921, 1679616, 2313441, 3111696, 4100625, 5308416, 6765201, 8503056, 10556001, 12960000, 15752961, 18974736, 22667121, 26873856, 31640625, 37015056, 43046721, 49787136, 57289761

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..10000

Index entries for linear recurrences with constant coefficients, signature (5,-10,10,-5,1).

Formula

a(n) = A000583(3n) = 81*A000583(n) = A008585(n)^4. - Wesley Ivan Hurt, May 10 2014

G.f.: -81*x*(1+x)*(x^2+10*x+1) / (x-1)^5. - R. J. Mathar, May 14 2014

Maple

A016768:=n->(3*n)^4; seq(A016768(n), n=0..40); # Wesley Ivan Hurt, May 10 2014

Mathematica

(3Range[0, 30])^4 (* Harvey P. Dale, Sep 19 2011 *)

Prog

(Magma) [(3*n)^4: n in [0..40]]; // Vincenzo Librandi, Sep 07 2011

Crossrefs

Sequence in context: A236790 A232876 A224355 * A224014 A059977 A231912

Adjacent sequences: A016765 A016766 A016767 * A016769 A016770 A016771

Keyword

nonn,easy

Author

N. J. A. Sloane, Dec 11 1996

Status

approved