OFFSET
0,2
MATHEMATICA
a[n_] := Ceiling[Sqrt[2*n]]^2 - 2*n; Array[a, 100, 0] (* Amiram Eldar, Feb 22 2022 *)
PROG
(Python)
from math import isqrt
def A350962(n): return 0 if n == 0 else (isqrt(2*n-1)+1)**2-2*n # Chai Wah Wu, Feb 22 2022
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Feb 22 2022
STATUS
approved