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a(n) = floor(6^n/n).
4

%I #12 Sep 08 2022 08:45:30

%S 6,18,72,324,1555,7776,39990,209952,1119744,6046617,32981550,

%T 181398528,1004668770,5597440292,31345665638,176319369216,

%U 995685849690,5642219814912,32071565263710,182807922003148,1044616697160850

%N a(n) = floor(6^n/n).

%H Vincenzo Librandi, <a href="/A129796/b129796.txt">Table of n, a(n) for n = 1..300</a>

%t Table[Floor[6^n/n],{n,30}] (* _Harvey P. Dale_, Feb 20 2015 *)

%o (Magma)[Floor(6^n / n): n in [1..25]]; // _Vincenzo Librandi_, May 08 2011

%Y Cf. A000799, A092763, A053638.

%K nonn

%O 1,1

%A _Mohammad K. Azarian_, May 18 2007