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A017993
Powers of cube root of 6 rounded up.
21
1, 2, 4, 6, 11, 20, 36, 66, 119, 216, 393, 714, 1296, 2355, 4280, 7776, 14130, 25676, 46656, 84780, 154055, 279936, 508678, 924329, 1679616, 3052065, 5545970, 10077696, 18312389, 33275820, 60466176, 109874334, 199654915, 362797056, 659246002
OFFSET
0,2
LINKS
MATHEMATICA
Table[Ceiling[6^(n/3)], {n, 0, 40}] (* Vincenzo Librandi, Jan 09 2014 *)
PROG
(Magma) [Ceiling(6^(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), A017987 (k=4), A017990 (k=5), this sequence (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: A254532 A199926 A068330 * A049870 A093970 A333098
KEYWORD
nonn
EXTENSIONS
More terms from Vincenzo Librandi, Jan 09 2014
STATUS
approved