OFFSET
0,1
LINKS
Clark Kimberling, Table of n, a(n) for n = 0..1000
FORMULA
a(n) = ceiling(r*2^n), where r = sqrt(3).
a(n) = A094386(n) + 1.
MATHEMATICA
PROG
(Python)
from math import isqrt
def A293325(n): return 1+isqrt(3*(1<<(n<<1))) # Chai Wah Wu, Jul 28 2022
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Oct 09 2017
STATUS
approved