A067475 Smallest n-digit square starting with 5.

529, 5041, 50176, 501264, 5004169, 50013184, 500014321, 5000045521, 50000090449, 500000309449, 5000000100624, 50000002660624, 500000010062400, 5000000124641041, 50000000111812804, 500000001150395524

Offset

3,1

Links

Robert Israel, Table of n, a(n) for n = 3..998

Formula

a(n) = ceiling(sqrt(5*10^(n-1)))^2, n>2. - Rick L. Shepherd, Feb 18 2002

Maple

seq(ceil(sqrt(5*10^(d-1)))^2, d=3..30); # Robert Israel, Sep 30 2016

Mathematica

Table[Ceiling[Sqrt[5*10^n]]^2, {n, 2, 20}] (* Harvey P. Dale, Aug 23 2014 *)

Prog

(PARI) for(n=3, 22, a=ceil(sqrt(5*10^(n-1)))^2; print(a))

Crossrefs

Cf. A035072 (roots), A045788, A067479 (2..9).

Sequence in context: A274932 A082409 A066742 * A052074 A112079 A156573

Adjacent sequences: A067472 A067473 A067474 * A067476 A067477 A067478

Keyword

base,easy,nonn

Author

Amarnath Murthy, Feb 09 2002

Extensions

More terms from Rick L. Shepherd, Feb 18 2002

Status

approved