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A167888
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n-th single or isolated number^n-th non-single or nonisolated number.
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0
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1, 4, 216, 248832, 612220032, 78310985281, 19683000000000, 4808584372417849, 717368321110468608, 5460999706120583177327, 1379946262057143768386569, 470184984576000000000000000, 164890958756244164895763202881
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listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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FORMULA
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EXAMPLE
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a(1)=2^0=1, a(2)=4^1=4, a(3)=6^3=216, a(4)=12^5=248832.
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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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