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A145434
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Decimal expansion of sum_{n=1..inf} (-1)^(n-1)*n^2/binomial(2n,n).
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1
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1, 2, 5, 5, 6, 7, 2, 8, 4, 7, 2, 2, 8, 7, 9, 6, 7, 6, 8, 8, 8, 8, 4, 5, 3, 4, 1, 3, 6, 3, 9, 5, 1, 5, 6, 5, 9, 6, 6, 0, 3, 4, 3, 4, 5, 3, 9, 6, 7, 7, 6, 8, 2, 7, 6, 1, 9, 4, 3, 9, 5, 1, 1, 6, 8, 0, 5, 9, 5, 1, 0, 2, 7, 6, 3, 1, 0, 9, 4, 4, 3, 0, 9, 1, 0, 8, 0, 7, 7, 8, 8, 2, 4
(list; constant; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| The numerator in the Apelblat table lacks the square (typo).
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REFERENCES
| Alexander Apelblat, Tables of Integrals and Series, Harri Deutsch, (1996), 4.1.40.
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FORMULA
| 4*(5-A002164*A002390)/125 .
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EXAMPLE
| 0.125567284722879676...
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MAPLE
| 4/25-4/125*5^(1/2)*ln(1/2+1/2*5^(1/2)) ;
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CROSSREFS
| Sequence in context: A130851 A130856 A004095 * A117899 A120839 A196608
Adjacent sequences: A145431 A145432 A145433 * A145435 A145436 A145437
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KEYWORD
| cons,easy,nonn
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AUTHOR
| R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 08 2009
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