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A067472
Smallest n-digit square starting with 2.
3
25, 225, 2025, 20164, 200704, 2002225, 20007729, 200024449, 2000057284, 20000182084, 200000361796, 2000001237796, 20000000402496, 200000010642496, 2000000040249600, 20000000215721449, 200000000447251216
OFFSET
2,1
FORMULA
a(n) = ceiling(sqrt(2*10^(n-1)))^2, n>1. - Rick L. Shepherd, Feb 14 2002
MATHEMATICA
Table[Ceiling[Sqrt[2*10^(n-1)]]^2, {n, 2, 30}] (* Harvey P. Dale, Apr 18 2021 *)
PROG
(PARI) for(n=2, 25, a=ceil(sqrt(2*10^(n-1)))^2; print(a))
CROSSREFS
Cf. A035069 (roots), A045785, A067479 (2..9).
Sequence in context: A288876 A065779 A095241 * A058426 A189275 A048384
KEYWORD
base,easy,nonn
AUTHOR
Amarnath Murthy, Feb 09 2002
EXTENSIONS
More terms from Rick L. Shepherd, Feb 14 2002
STATUS
approved