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A017987 Powers of cube root of 4 rounded up. 0
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 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

MATHEMATICA

Ceiling[(Power[4, (3)^-1])^Range[0, 40]]  (* From Harvey P. Dale, Mar 28 2011 *)

CROSSREFS

Sequence in context: A023361 A113435 A025048 * A165407 A039897 A050193

Adjacent sequences:  A017984 A017985 A017986 * A017988 A017989 A017990

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 14 17:10 EST 2012. Contains 205644 sequences.