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

Author

N. J. A. Sloane

Keywords

• nonn

Crossrefs

Cf. A004229, A004230.

Cf. A004216, A004219, A004222, A004225.

Programs

Mathematica

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