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A160428
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Number of ON cells at n-th stage of three-dimensional version of the cellular automaton A160410, using cubes.
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7
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0, 8, 64, 120, 512, 568, 960, 1352, 4096, 4152, 4544, 4936, 7680, 8072, 10816, 13560, 32768, 32824, 33216, 33608, 36352, 36744, 39488, 42232, 61440, 61832, 64576, 67320, 86528, 89272, 108480, 127688, 262144, 262200, 262592, 262984, 265728, 266120, 268864, 271608
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) = 8 * Sum_{k=0..n-1} 7^A000120(k)
a(n) = 8 + 56 * Sum_{k=1..n-1} A151785(k) for n >= 1
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MATHEMATICA
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a[n_] := 8*Sum[7^DigitCount[k, 2, 1], {k, 0, n - 1}]; Array[a, 40, 0] (* Michael De Vlieger, Nov 01 2022 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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