A030691 Cube root of A030690.

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

Offset: 1

Author

Patrick De Geest

Keywords

• nonn
• base

Comments

Smallest m such that m^3 begins with n^2.

Examples

			a(4)=55 because 55^3=166375 begins with 4^2=16. - _Zak Seidov_, Oct 18 2011
		

Links

• Zak Seidov, Table of n, a(n) for n = 1..1000

Programs

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 *)