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A230664 a(n) = floor(3^n/n^2). 2
3, 2, 3, 5, 9, 20, 44, 102, 243, 590, 1464, 3690, 9433, 24402, 63772, 168151, 446851, 1195742, 3219560, 8716961, 23719621, 64836900, 177964421, 490329056, 1355661775, 3760156550, 10460353203, 29179582212, 81605680576, 228767924549, 642740266684, 1809590028175 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
a(n) = floor(A000244(n)/A000290(n)).
MATHEMATICA
Table[Floor[3^n/n^2], {n, 40}] (* Wesley Ivan Hurt, Apr 25 2023 *)
PROG
(Python)
for n in range(1, 100): print str(3**n // n**2)+', ',
CROSSREFS
Sequence in context: A243109 A206012 A211940 * A175717 A051701 A225696
KEYWORD
nonn
AUTHOR
Alex Ratushnyak, Dec 11 2013
STATUS
approved

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Last modified May 25 10:29 EDT 2024. Contains 372787 sequences. (Running on oeis4.)