

A035069


a(n) is root of square starting with digit 2: first term of runs.


3



5, 15, 45, 142, 448, 1415, 4473, 14143, 44722, 141422, 447214, 1414214, 4472136, 14142136, 44721360, 141421357, 447213596, 1414213563, 4472135955, 14142135624, 44721359550, 141421356238, 447213595500, 1414213562374
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OFFSET

1,1


LINKS

Table of n, a(n) for n=1..24.


FORMULA

a(n) = ceiling(sqrt(2*10^n)).


MATHEMATICA

Table[Ceiling @ Sqrt[2 * 10^n], {n, 1, 24}] (* Amiram Eldar, Oct 08 2019 *)


CROSSREFS

Cf. A067472 (squares), A035076 (2..9).
Sequence in context: A200664 A099235 A207096 * A176611 A001869 A058425
Adjacent sequences: A035066 A035067 A035068 * A035070 A035071 A035072


KEYWORD

nonn,base


AUTHOR

Patrick De Geest, Nov 15 1998


EXTENSIONS

Offset 1 from Michel Marcus, Oct 08 2019


STATUS

approved



