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A132120
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Decimal expansion of the constant obtained through Pierce retro-expansion of the prime sequence.
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0
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3, 6, 2, 3, 0, 6, 2, 2, 2, 3, 6, 6, 4, 9, 8, 0, 4, 8, 7, 9, 8, 6, 2, 6, 3, 7, 2, 2, 2, 4, 0, 9, 3, 4, 6, 1, 8, 1, 1, 1, 7, 9, 8, 5, 8, 5, 3, 4, 4, 2, 0, 9, 9, 9, 7, 5, 9, 9, 5, 1, 0, 1, 7, 0, 2, 7, 8, 4, 1, 8, 8, 6, 3, 0, 6, 8, 9, 6, 5, 2
(list; constant; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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LINKS
| Eric Weisstein's World of Mathematics, Pierce Expansion, MathWorld.
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FORMULA
| Equals sum_{i=1..infinity} (-1)^(i+1)/A002110(i).
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EXAMPLE
| Equals 0.36230622236649804879862637222409346181117985853442099975995101702784188630689652...
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MAPLE
| Digits := 80 : a := 0 : for i from 1 to 100 do a := a+(-1.0)^(i-1)/mul(ithprime(j), j=1..i) ; print(a) ; od:
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CROSSREFS
| Cf. A064648.
Sequence in context: A133358 A058099 A124085 * A021280 A193537 A021738
Adjacent sequences: A132117 A132118 A132119 * A132121 A132122 A132123
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KEYWORD
| cons,nonn
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AUTHOR
| R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 31 2007
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