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A018107
Powers of fourth root of 21 rounded up.
0
1, 3, 5, 10, 21, 45, 97, 207, 441, 945, 2021, 4327, 9261, 19825, 42440, 90850, 194481, 416325, 891224, 1907839, 4084101, 8742816, 18715702, 40064613, 85766121, 183599119, 393029742, 841356859, 1801088541
OFFSET
0,2
MATHEMATICA
Ceiling[Surd[21, 4]^Range[0, 30]] (* Harvey P. Dale, Jan 11 2013 *)
CROSSREFS
Sequence in context: A293321 A284237 A241436 * A360882 A053709 A102772
KEYWORD
nonn
STATUS
approved