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A091682 Decimal expansion of (2*(18 + Sqrt[3]*Pi))/27. 0
1, 7, 3, 6, 3, 9, 9, 8, 5, 8, 7, 1, 8, 7, 1, 5, 0, 7, 7, 9, 0, 9, 7, 9, 5, 1, 6, 8, 3, 6, 4, 9, 2, 3, 4, 9, 6, 0, 6, 3, 1, 2, 5, 8, 3, 2, 9, 0, 9, 4, 9, 7, 9, 0, 5, 6, 8, 2, 1, 9, 6, 6, 5, 2, 3, 0, 8, 4, 7, 1, 8, 1, 8, 0, 2, 8, 0, 7, 8, 6, 4, 0, 8, 1, 8, 6, 9, 4, 4, 4, 1, 8, 2, 4, 9, 0, 2, 2, 5, 9, 7, 4 (list; constant; graph; refs; listen; history; internal format)
OFFSET

0,2

COMMENTS

Sum[(n!)^2/(2n)!,{n,0,Infinity}]

LINKS

Eric Weisstein's World of Mathematics, Factorial Sums

FORMULA

Equals A073016 plus 1. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 08 2008]

EXAMPLE

1.73639985...

CROSSREFS

Sequence in context: A021580 A194557 A198425 * A073016 A019819 A197028

Adjacent sequences:  A091679 A091680 A091681 * A091683 A091684 A091685

KEYWORD

nonn,cons

AUTHOR

Eric Weisstein (eric(AT)weisstein.com), Jan 28, 2004

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Last modified February 17 16:13 EST 2012. Contains 206050 sequences.