OFFSET
0,1
LINKS
Clark Kimberling, Table of n, a(n) for n = 0..1000
FORMULA
MATHEMATICA
PROG
(Python)
from math import isqrt
def A293333(n): return (k:=isqrt(m:=5*(1<<(n<<1))))+int((m-k*(k+1)<<2)-1>=0) # Chai Wah Wu, Jul 28 2022
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Oct 10 2017
STATUS
approved