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A004193
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-(-1)^n*2*(2n+1)!*Bernoulli(2n)/(n!*2^n).
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2
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1, 1, 5, 63, 1575, 68409, 4729725, 488783295, 71982456975, 14550187083705, 3916321542458325, 1368981608178405375, 608576219802039864375, 337967570725260384533625, 230885276313275432674678125
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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REFERENCES
| J. Spanier and K. B. Oldham, An Atlas of Functions, Hemisphere, NY, 1987, p. 35, Eq. 4:2:1.
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LINKS
| Index entries for sequences related to Bernoulli numbers.
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PROG
| (PARI) a(n)=if(n<1, 0, -(-1)^n*2*(2*n+1)!*bernfrac(2*n)/(n!*2^n))
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CROSSREFS
| Bernoulli numbers are A000367/A002445.
Sequence in context: A067129 A063079 A112788 * A193326 A027667 A193834
Adjacent sequences: A004190 A004191 A004192 * A004194 A004195 A004196
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KEYWORD
| nonn,nice
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AUTHOR
| David W. Cantrell (DWCantrell(AT)sigmaxi.net)
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