OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..10000
MATHEMATICA
Ceiling[Range[0, 60]Sqrt[8]] (* Harvey P. Dale, May 05 2012 *)
PROG
(Magma) [Ceiling(n*Sqrt(8)): n in [0..60]]
(Python)
from math import isqrt
def A198263(n): return 1+isqrt(n*n<<3) if n else 0 # Chai Wah Wu, Jul 29 2022
CROSSREFS
KEYWORD
nonn
AUTHOR
Vincenzo Librandi, Oct 24 2011
STATUS
approved