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A018002
Powers of cube root of 9 rounded up.
21
1, 3, 5, 9, 19, 39, 81, 169, 351, 729, 1517, 3155, 6561, 13648, 28388, 59049, 122827, 255491, 531441, 1105442, 2299412, 4782969, 9948977, 20694705, 43046721, 89540788, 186252345, 387420489, 805867092, 1676271102, 3486784401, 7252803827, 15086439913, 31381059609
OFFSET
0,2
LINKS
MATHEMATICA
Table[Ceiling[9^(n/3)], {n, 0, 40}] (* Vincenzo Librandi, Jan 09 2014 *)
PROG
(Magma) [Ceiling(9^(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), A017993 (k=6), A017996 (k=7), this sequence (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: A071384 A291398 A078066 * A255822 A227234 A192480
KEYWORD
nonn
EXTENSIONS
More terms from Vincenzo Librandi, Jan 09 2014
STATUS
approved