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A030691 Cube root of A030690. 4
5, 16, 21, 55, 63, 154, 17, 40, 201, 10, 23, 113, 257, 27, 609, 295, 307, 148, 1535, 342, 164, 1692, 809, 1793, 397, 878, 90, 428, 944, 4482, 987, 1008, 1029, 4872, 107, 2349, 5154, 5247, 2478, 252, 552, 5609, 5697, 5785, 2726, 1284, 2806, 6131 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Smallest m such that m^3 begins with n^2.
LINKS
EXAMPLE
a(4)=55 because 55^3=166375 begins with 4^2=16. - Zak Seidov, Oct 18 2011
MATHEMATICA
s={}; Do[If[n==3, AppendTo[s, 21], k=1; While[(ra=Range[Ceiling[(n^2*10^k)^(1/3)], Floor[((n^2+1)*10^k)^(1/3)]]) == {}, k++]; AppendTo[s, ra[[1]]]], {n, 100}]; s (* Zak Seidov, Oct 18 2011 *)
CROSSREFS
Sequence in context: A077469 A022140 A041855 * A041107 A042603 A031120
KEYWORD
nonn,base
AUTHOR
STATUS
approved

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Last modified March 4 04:28 EST 2024. Contains 370522 sequences. (Running on oeis4.)