A067478 - OEIS

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A067478

Smallest n-digit square starting with 8.

81, 841, 8100, 80089, 801025, 8003241, 80013025, 800041225, 8000050249, 80000162649, 800001447184, 8000004951184, 80000001609984, 800000042569984, 8000000160998400, 80000000297200369, 800000000000150481, 8000000001435765625, 80000000000015048100

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OFFSET

2,1

LINKS

Table of n, a(n) for n=2..20.

FORMULA

a(n) = ceiling(sqrt(8*10^(n-1)))^2. - Sascha Kurz, Mar 18 2002

MATHEMATICA

nS[n_] := Module[{lr = Floor[Sqrt[n]]}, If[lr^2==n, lr^2, (lr + 1)^2]]; Table[nS[8 10^i], {i, 0, 20}]

CROSSREFS

Cf. A000290, A035075 (roots), A045791, A067479 (2..9).

Sequence in context: A247842 A273233 A045792 * A076749 A222995 A173810