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A018048
Powers of fourth root of 2 rounded down.
1
1, 1, 1, 1, 2, 2, 2, 3, 4, 4, 5, 6, 8, 9, 11, 13, 16, 19, 22, 26, 32, 38, 45, 53, 64, 76, 90, 107, 128, 152, 181, 215, 256, 304, 362, 430, 512, 608, 724, 861, 1024, 1217, 1448, 1722, 2048, 2435, 2896, 3444, 4096, 4870
OFFSET
0,5
LINKS
MAPLE
seq(floor(2^(n/4)), n=0..100); # Robert Israel, Jul 28 2015
PROG
(PARI) vector(70, n, n--; floor(2^(n/4))) \\ Michel Marcus, Jul 28 2015
(PARI) a(n)=sqrtnint(2^n, 4) \\ Charles R Greathouse IV, Jul 28 2015
CROSSREFS
Cf. A017979.
Sequence in context: A143644 A363336 A104410 * A077564 A088044 A351908
KEYWORD
nonn,easy
AUTHOR
STATUS
approved