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A004242
a(n) = ceiling(1000*log(n)).
0
0, 694, 1099, 1387, 1610, 1792, 1946, 2080, 2198, 2303, 2398, 2485, 2565, 2640, 2709, 2773, 2834, 2891, 2945, 2996, 3045, 3092, 3136, 3179, 3219, 3259, 3296, 3333, 3368, 3402, 3434, 3466, 3497, 3527
OFFSET
1,2
MATHEMATICA
Ceiling[1000Log[Range[40]]] (* Harvey P. Dale, Oct 24 2023 *)
CROSSREFS
Sequence in context: A031946 A049356 A020385 * A177215 A185861 A115493
KEYWORD
nonn
STATUS
approved