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A145433 Decimal expansion of sum_{n=1..inf} (-1)^(n-1)*n/binomial(2n,n). 1
2, 7, 4, 4, 3, 2, 7, 1, 5, 2, 7, 7, 1, 2, 0, 3, 2, 3, 1, 1, 1, 1, 5, 4, 6, 5, 8, 6, 3, 6, 0, 4, 8, 4, 3, 4, 0, 3, 3, 9, 6, 5, 6, 5, 4, 6, 0, 3, 2, 2, 3, 1, 7, 2, 3, 8, 0, 5, 6, 0, 4, 8, 8, 3, 1, 9, 4, 0, 4, 8, 9, 7, 2, 3, 6, 8, 9, 0, 5, 5, 6, 9, 0, 8, 9, 1, 9, 2, 2, 1, 1, 7, 5 (list; constant; graph; refs; listen; history; internal format)
OFFSET

0,1

REFERENCES

Alexander Apelblat, Tables of Integrals and Series, Harri Deutsch, (1996), 4.1.39

FORMULA

2*(15+2*A002163*A002390)/125

EXAMPLE

0.274432715277120323..

MAPLE

6/25+4/125*5^(1/2)*ln(1/2+1/2*5^(1/2)) ;

CROSSREFS

Sequence in context: A092943 A196501 A066766 * A055200 A093590 A065629

Adjacent sequences:  A145430 A145431 A145432 * A145434 A145435 A145436

KEYWORD

cons,easy,nonn

AUTHOR

R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 08 2009

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Last modified February 14 00:47 EST 2012. Contains 205567 sequences.