A004228 a(n) = 10000*log_10(n) rounded down.

0, 3010, 4771, 6020, 6989, 7781, 8450, 9030, 9542, 10000, 10413, 10791, 11139, 11461, 11760, 12041, 12304, 12552, 12787, 13010, 13222, 13424, 13617, 13802, 13979, 14149, 14313, 14471, 14623

Offset

1,2

Links

Table of n, a(n) for n=1..29.

Mathematica

Floor[10^4 Log[10, Range[30]]] (* Harvey P. Dale, Feb 07 2015 *)

Crossrefs

Cf. A004229, A004230.

Cf. A004216, A004219, A004222, A004225.

Sequence in context: A031818 A152207 A279584 * A004229 A351867 A004230

Adjacent sequences: A004225 A004226 A004227 * A004229 A004230 A004231

Keyword

nonn

Author

N. J. A. Sloane

Status

approved