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A368325
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Union of primorials and powers of 2.
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1
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1, 2, 4, 6, 8, 16, 30, 32, 64, 128, 210, 256, 512, 1024, 2048, 2310, 4096, 8192, 16384, 30030, 32768, 65536, 131072, 262144, 510510, 524288, 1048576, 2097152, 4194304, 8388608, 9699690, 16777216, 33554432, 67108864, 134217728, 223092870, 268435456, 536870912, 1073741824
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OFFSET
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1,2
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COMMENTS
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Numbers that (1) are either prime powers or squarefree and (2) have a primorial kernel.
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LINKS
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FORMULA
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MATHEMATICA
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Union@ Flatten@ {#, 2^Range[Log2[Last[#] ] ] } &@
FoldList[Times, 1, Prime@ Range[nn]]
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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