A067097 Floor[X/Y] where X = concatenation in increasing order of first n powers of 2 and Y = that of first n natural numbers.

2, 2, 2, 20, 201, 2010, 201012, 20101226, 2010122457, 201012245610, 20101224560848, 2010122456084687, 201012245608468521, 201012245608468519453, 201012245608468519428723, 201012245608468519428463029, 2010122456084685194284602619644

Offset: 1

Author

Amarnath Murthy, Jan 07 2002

Keywords

• easy
• base
• nonn

Examples

			a(6)= floor [ 248163264/123456] = floor[2010.13530326594090202177293] = 2010.
		

Crossrefs

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

floor[A045507(n)/A019519(n)]

Programs

Mathematica

f[n_] := (k = 1; x = y = "0"; While[k < n + 1, x = StringJoin[x, ToString[2^k]]; y = StringJoin[y, ToString[k]]; k++ ]; Return[ Floor[ ToExpression[x] / ToExpression[y]]] ); Table[ f[n], {n, 1, 20} ]
Table[Floor[FromDigits[Flatten[IntegerDigits/@(2^Range[n])]]/FromDigits[ Flatten[IntegerDigits/@Range[n]]]],{n,20}] (* Harvey P. Dale, Dec 30 2018 *)

Extensions

More terms from Robert G. Wilson v, Jan 09 2002

More terms from Harvey P. Dale, Dec 30 2018