OFFSET
0,2
MATHEMATICA
Round[(Power[7, (4)^-1])^Range[0, 40]] (* Harvey P. Dale, Jan 16 2011 *)
PROG
(Python)
from sympy import integer_nthroot
def A018064(n): return -integer_nthroot(m:=7**n, 4)[0]+integer_nthroot(m<<4, 4)[0] # Chai Wah Wu, Jun 20 2024
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved