A035072 a(n) is root of square starting with digit 5: first term of runs.

23, 71, 224, 708, 2237, 7072, 22361, 70711, 223607, 707107, 2236068, 7071068, 22360680, 70710679, 223606798, 707106782, 2236067978, 7071067812, 22360679775, 70710678119, 223606797750, 707106781187, 2236067977500

Offset

2,1

Links

Table of n, a(n) for n=2..24.

Formula

a(n) = ceiling(sqrt(5*10^n)), n > 1.

Mathematica

Table[Ceiling @ Sqrt[5 * 10^n], {n, 2 , 24}] (* Amiram Eldar, Oct 08 2019 *)

Crossrefs

Cf. A067475 (squares), A035076 (2..9).

Sequence in context: A248877 A321356 A139878 * A201716 A269521 A044161

Adjacent sequences: A035069 A035070 A035071 * A035073 A035074 A035075

Keyword

nonn,base

Author

Patrick De Geest, Nov 15 1998

Status

approved