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Search: id:A139232
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OFFSET
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1,1
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COMMENT
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Second differences of even superperfect numbers, multiplied by 2 (See A139236).
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FORMULA
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a(n) = A139236(n)*2.
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CROSSREFS
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Cf. A000668, A019279, A061652, A139228, A139229, A139230, A139231, A139233, A139234, A139235, A139236, A139237.
Sequence in context: A083873 A143854 A139241 this_sequence A002292 A010008 A000529
Adjacent sequences: A139229 A139230 A139231 this_sequence A139233 A139234 A139235
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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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