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Search: id:A139242
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| A139242 |
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Second differences of Mersenne numbers A001348, divided by 2. |
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+0
5
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OFFSET
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1,1
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FORMULA
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a(n) = 139241(n)/2.
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CROSSREFS
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Cf. A001348, A139233, A139237, A139238, A139239, A139240, A139241, A139243.
Sequence in context: A117327 A117404 A089222 this_sequence A139236 A096000 A047672
Adjacent sequences: A139239 A139240 A139241 this_sequence A139243 A139244 A139245
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KEYWORD
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easy,nonn
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Apr 19 2008
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