A074109 Smallest n-digit squarefree number.

2, 10, 101, 1001, 10001, 100001, 1000001, 10000001, 100000001, 1000000001, 10000000001, 100000000002, 1000000000001, 10000000000001, 100000000000001, 1000000000000001, 10000000000000001, 100000000000000001

Offset

1,1

Comments

For n>=3, a(n) = 10^(n-1)+1 unless n-1 is in A086982. - Robert Israel, Mar 23 2020

Links

Table of n, a(n) for n=1..18.

Mathematica

Join[{2}, Table[x = 10^n; k = 0; While[! SquareFreeQ[y = x + k], k++]; y, {n, 19}]] (* Jayanta Basu, Aug 01 2013 *)

Crossrefs

Cf. A074110, A086982.

Sequence in context: A324241 A188193 A228120 * A291101 A036336 A070842

Adjacent sequences: A074106 A074107 A074108 * A074110 A074111 A074112

Keyword

base,nonn

Author

Amarnath Murthy, Aug 26 2002

Extensions

More terms from Matthew Conroy, Aug 27 2002

Status

approved