OFFSET
1,1
LINKS
Michael S. Branicky, Table of n, a(n) for n = 1..1999
FORMULA
a(n) = ceiling(sqrt(3*10^n)).
MATHEMATICA
Table[Ceiling @ Sqrt[3 * 10^n], {n, 1, 24}] (* Amiram Eldar, Oct 08 2019 *)
PROG
(Python)
from math import isqrt
def a(n): return isqrt(3*10**n) + 1
print([a(n) for n in range(1, 28)]) # Michael S. Branicky, Jun 18 2021
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Nov 15 1998
EXTENSIONS
Offset 1 from Alois P. Heinz, Oct 08 2019
STATUS
approved