A067088 Floor(X/Y) where X = concatenation of (n+1), (n+2), ...up to 2n and Y = concatenation of 1,2,3,4,... up to n.

2, 2, 3, 4, 54, 6391, 721719, 73719014, 819008271, 900826453, 982644636, 1064462818, 1146281001, 1228099183, 1309917366, 1391735548, 1473553731, 1555371913, 1637190096, 1719008278, 1800826461, 1882644643, 1964462826

Offset: 1

Author

Amarnath Murthy, Jan 07 2002

Keywords

• easy
• base
• nonn

Examples

			a(4) = floor(5678/1234) = floor(4.60129659643435980551053484602917) = 4; a(6) = floor(789101112/123456) = 6391.
		

Programs

Mathematica

f[n_] := (k = 1; x = y = "0"; While[k < n + 1, x = StringJoin[x, ToString[n + k]]; y = StringJoin[y, ToString[2k - 1]]; k++ ]; Return[ Floor[ ToExpression[x] / ToExpression[y]]] ); Table[ f[n], {n, 1, 24} ]

Extensions

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

Offset corrected by Sean A. Irvine, Dec 02 2023