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Search: id:A139233
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| A139233 |
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Second differences of perfect numbers A000396, divided by 2. |
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+0
11
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OFFSET
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1,1
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FORMULA
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a(n) = A139230(n)/2.
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CROSSREFS
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Cf. A000396, A139228, A139229, A139230, A139231, A139232, A139234, A139235, A139236, A139237.
Sequence in context: A108819 A158226 A152834 this_sequence A153165 A094491 A162604
Adjacent sequences: A139230 A139231 A139232 this_sequence A139234 A139235 A139236
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KEYWORD
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nonn
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Apr 19 2008
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