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A017987
Powers of cube root of 4 rounded up.
21
1, 2, 3, 4, 7, 11, 16, 26, 41, 64, 102, 162, 256, 407, 646, 1024, 1626, 2581, 4096, 6502, 10322, 16384, 26008, 41286, 65536, 104032, 165141, 262144, 416128, 660562, 1048576, 1664511, 2642246, 4194304, 6658043, 10568984, 16777216, 26632171, 42275936, 67108864
OFFSET
0,2
LINKS
J. Peebles, Cap Set Bounds and Matrix Multiplication, Math 197: Senior Thesis, Harvey Mudd College, 2013.
MATHEMATICA
Ceiling[Surd[4, 3]^Range[0, 40]] (* Harvey P. Dale, May 15 2013 *)
Table[Ceiling[4^(n/3)], {n, 0, 40}] (* Vincenzo Librandi, Jan 09 2014 *)
PROG
(Magma) [Ceiling(4^(n/3)): n in [0..50]]; // Vincenzo Librandi, Jan 09 2014
CROSSREFS
Cf. powers of cube root of k ceiling up: A017981 (k=2), A017984 (k=3), this sequence (k=4), A017990 (k=5), A017993 (k=6), A017996 (k=7), A018002 (k=9), A018005 (k=10), A018008 (k=11), A018011 (k=12), A018014 (k=13), A018017 (k=14), A018020 (k=15), A018023 (k=16), A018026 (k=17), A018029 (k=18), A018032 (k=19), A018035 (k=20), A018038 (k=21), A018041 (k=22), A018044 (k=23), A018047 (k=24).
Sequence in context: A367667 A222022 A025048 * A337495 A222023 A221997
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Vincenzo Librandi, Jan 09 2014
STATUS
approved