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A018037
Powers of cube root of 21 rounded to nearest integer.
22
1, 3, 8, 21, 58, 160, 441, 1217, 3357, 9261, 25550, 70492, 194481, 536558, 1480324, 4084101, 11267725, 31086799, 85766121, 236622225, 652822777, 1801088541, 4969066720, 13709278307, 37822859361, 104350401111, 287894844440, 794280046581, 2191358423329
OFFSET
0,2
LINKS
MATHEMATICA
Table[Round[21^(n/3)], {n, 0, 40}] (* Vincenzo Librandi, Jan 08 2014 *)
PROG
(Magma) [Round(21^(n/3)): n in [0..40]]; // Vincenzo Librandi, Jan 08 2014
CROSSREFS
Cf. powers of cube root of k rounded up: A017980 (k=2), A017983 (k=3), A017986 (k=4), A017989 (k=5), A017992 (k=6), A017995 (k=7), A018001 (k=9), A018004 (k=10), A018007 (k=11), A018010 (k=12), A018013 (k=13), A018016 (k=14), A018019 (k=15), A018022 (k=16), A018025 (k=17), A018028 (k=18), A018031 (k=19), A018034 (k=20), this sequence (k=21), A018040 (k=22), A018043 (k=23), A018046 (k=24).
Sequence in context: A158495 A349186 A273720 * A018038 A000737 A371891
KEYWORD
nonn
EXTENSIONS
More terms from Vincenzo Librandi, Jan 08 2014
STATUS
approved