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A016768
(3*n)^4.
3
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
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
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Dec 11 1996
STATUS
approved