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Powers of fourth root of 18 rounded to nearest integer.

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`%I #7 Nov 21 2013 12:46:09
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`%S 1,2,4,9,18,37,76,157,324,667,1375,2831,5832,12013,24743,50965,104976,
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`%T 216226,445375,917370,1889568,3892070,8016758,16512655,34012224,
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`%U 70057261,144301645,297227788,612220032
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`%N Powers of fourth root of 18 rounded to nearest integer.
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`%t Floor[(Power[18, (4)^-1])^Range[0,30]+1/2] (* _Harvey P. Dale_, May 25 2011 *)
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`%K nonn
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`%O 0,2
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`%A _N. J. A. Sloane_.
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