A018123 Powers of fifth root of 4 rounded down.

1, 1, 1, 2, 3, 4, 5, 6, 9, 12, 16, 21, 27, 36, 48, 64, 84, 111, 147, 194, 256, 337, 445, 588, 776, 1024, 1351, 1782, 2352, 3104, 4096, 5404, 7131, 9410, 12416, 16384, 21618, 28526, 37640, 49667, 65536, 86475, 114104, 150562, 198668, 262144, 345901, 456419, 602248, 794672, 1048576

Offset

0,4

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..2000

Maple

a:= n-> floor(4^(n/5)):
seq(a(n), n=0..50);  # Alois P. Heinz, Jun 11 2025

Mathematica

Table[Floor[(4^(1/5))^n], {n, 0, 35}] (* Vincenzo Librandi, Jun 11 2025 *)

Prog

(Magma) seq := [Floor(4^(n/5)) : n in [0..50]]; seq; // Vincenzo Librandi, Jun 11 2025

Crossrefs

Cf. A005533.

Sequence in context: A358033 A057492 A178715 * A105859 A200445 A255362

Adjacent sequences: A018120 A018121 A018122 * A018124 A018125 A018126

Keyword

nonn

Author

N. J. A. Sloane

Status

approved