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A018066
Powers of fourth root of 8 rounded down.
1
1, 1, 2, 4, 8, 13, 22, 38, 64, 107, 181, 304, 512, 861, 1448, 2435, 4096, 6888, 11585, 19483, 32768, 55108, 92681, 155871, 262144, 440871, 741455, 1246974, 2097152, 3526975, 5931641, 9975792, 16777216
OFFSET
0,3
LINKS
FORMULA
a(n)^4 <= 8^n < (a(n)+1)^4. - Robert Israel, May 08 2018
MAPLE
seq(floor(2^(3*k/4)), k=0..100); # Robert Israel, May 08 2018
PROG
(PARI) a(n) = sqrtnint(8^n, 4); \\ Michel Marcus, May 08 2018
CROSSREFS
Cf. A017928 (bisection).
Sequence in context: A164411 A164443 A074467 * A164509 A164415 A233274
KEYWORD
nonn
AUTHOR
STATUS
approved