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A077513
Smallest n-digit squarefree number beginning with n.
1
1, 21, 301, 4001, 50001, 600001, 7000001, 80000002, 900000001, 1000000001, 11000000001, 120000000001, 1300000000001, 14000000000001, 150000000000001, 1600000000000001, 17000000000000002, 180000000000000001
OFFSET
1,2
MATHEMATICA
snsf[n_]:=Module[{k=0, p=n*10^(n-IntegerLength[n])}, While[!SquareFreeQ[ p+k], k++]; p+k]; Array[snsf, 20] (* Harvey P. Dale, Apr 08 2018 *)
CROSSREFS
Cf. A077514.
Sequence in context: A007592 A019664 A019839 * A079517 A021784 A019618
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Nov 08 2002
EXTENSIONS
More terms from Sascha Kurz, Jan 04 2003
STATUS
approved