A017985 - OEIS

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A017985

Powers of cube root of 4 rounded down.

21

1, 1, 2, 4, 6, 10, 16, 25, 40, 64, 101, 161, 256, 406, 645, 1024, 1625, 2580, 4096, 6501, 10321, 16384, 26007, 41285, 65536, 104031, 165140, 262144, 416127, 660561, 1048576, 1664510, 2642245, 4194304, 6658042, 10568983, 16777216, 26632170, 42275935, 67108864

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OFFSET

0,3

LINKS

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

FORMULA

a(n) = floor(4^(n/3)). - Wesley Ivan Hurt, Sep 04 2022

MATHEMATICA

Table[Floor[4^(n/3)], {n, 0, 40}] (* Vincenzo Librandi, Jan 06 2014 *)

PROG

(Magma) [Floor(4^(n/3)): n in [0..50]]; // Vincenzo Librandi, Jan 06 2014

CROSSREFS

Cf. sequences of the type: Powers of cube root of (k) rounded down A017979 (k=2), A017982 (k=3), this sequence (k=4), A017988 (k=5), A017991 (k=6), A017994 (k=7), A018000 (k=9), A018003 (k=10), A018006 (k=11), A018009 (k=12), A018012 (k=13), A018015 (k=14), A018018 (k=15), A018021 (k=16), A018024 (k=17), A018027 (k=18), A018030 (k=19), A018033 (k=20), A018036 (k=21), A018039 (k=22), A018042 (k=23), A018045 (k=24).

Sequence in context: A028445 A006305 A067247 * A327474 A347207 A028488

Adjacent sequences: A017982 A017983 A017984 * A017986 A017987 A017988

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Vincenzo Librandi, Jan 06 2014

STATUS

approved