A017980 Powers of cube root of 2 rounded to nearest integer.

1, 1, 2, 2, 3, 3, 4, 5, 6, 8, 10, 13, 16, 20, 25, 32, 40, 51, 64, 81, 102, 128, 161, 203, 256, 323, 406, 512, 645, 813, 1024, 1290, 1625, 2048, 2580, 3251, 4096, 5161, 6502, 8192, 10321, 13004, 16384, 20643, 26008, 32768, 41285, 52016, 65536, 82570, 104032

Offset

0,3

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Mathematica

Table[Round[2^(n/3)], {n, 0, 50}] (* Vincenzo Librandi, Jan 07 2014 *)
Round[Surd[2, 3]^Range[0, 50]] (* Harvey P. Dale, Oct 07 2014 *)

Prog

(Magma) [Round(2^(n/3)): n in [0..50]]; // Vincenzo Librandi, Jan 07 2014

Crossrefs

Cf. powers of cube root of k rounded up: this sequence (k=2), A017983 (k=3), A017986 (k=4), A017989 (k=5), A017992 (k=6), A017995 (k=7), A018001 (k=9), A018004 (k=10), A018007 (k=11), A018010 (k=12), A018013 (k=13), A018016 (k=14), A018019 (k=15), A018022 (k=16), A018025 (k=17), A018028 (k=18), A018031 (k=19), A018034 (k=20), A018037 (k=21), A018040 (k=22), A018043 (k=23), A018046 (k=24).

Sequence in context: A365072 A118082 A120160 * A064650 A174619 A130083

Adjacent sequences: A017977 A017978 A017979 * A017981 A017982 A017983

Keyword

nonn

Author

N. J. A. Sloane.

Extensions

More terms from Vincenzo Librandi, Jan 07 2014

Status

approved