%I #5 Mar 10 2019 12:44:54

%S 3,3,31,318,31817,3181548,3181530396,3181528335091,31815281031585777,

%T 31815281005815399552,318152810055319253966698,

%U 3181528100552883295133046294,318152810055287994498392866979206

%N Floor[X/Y] where X = concatenation in increasing order of first n powers of 3 and Y = that of first n natural numbers.

%e a(4)= floor [ 392781/1234] = floor[318.299027552674230145867098865478] = 318.

%t f[n_] := (k = 1; x = y = "0"; While[k < n + 1, x = StringJoin[x, ToString[3^k]]; y = StringJoin[y, ToString[k]]; k++ ]; Return[ Floor[ ToExpression[x] / ToExpression[y]]] ); Table[ f[n], {n, 1, 15} ]

%t Table[Floor[FromDigits[Flatten[IntegerDigits/@(3^Range[n])]]/ FromDigits[ Flatten[IntegerDigits/@Range[n]]]],{n,15}] (* _Harvey P. Dale_, Mar 10 2019 *)

%Y Cf. A067088, A067089, A067090, A067091, A067092, A067093, A067094, A067095, A067096, A067097.

%K easy,base,nonn

%O 1,1

%A _Amarnath Murthy_, Jan 07 2002

%E More terms from _Robert G. Wilson v_, Jan 09 2002