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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Robert Israel, Table of n, a(n) for n = 0..4424

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: A164507 A164411 A074467 * A164509 A164415 A233274

Adjacent sequences:  A018063 A018064 A018065 * A018067 A018068 A018069

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified March 5 11:57 EST 2021. Contains 341823 sequences. (Running on oeis4.)