A077147 a(n) = floor({concatenation 123 ... up to n}/n).

1, 6, 41, 308, 2469, 20576, 176366, 1543209, 13717421, 1234567891, 112233444637, 10288065758426, 949667608470093, 88183420786508665, 8230452606740808761, 771604931881950821344, 72621640647713018479506

Offset: 1

Author

Amarnath Murthy, Oct 30 2002

Keywords

• base
• nonn

Examples

			a(5) = floor(12345/5) = 2469.
		

Crossrefs

Cf. A007908.

Programs

Maple

seq(floor(parse(cat(seq(i,i=1..n)))/n),n=1..20); (C. Ronaldo)

Formula

a(n) = floor(A007908(n) / n). - Sean A. Irvine, May 08 2025

Extensions

More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 17 2005