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A056890
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Denominators of continued fraction for left factorial.
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1
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1, -1, 0, -1, -2, 1, 1, 0, 1, -1, -4, 3, 14, -11, -63, 52, 353, -301, -2356, 2055, 18194, -16139, -159335, 143196, 1559017, -1415821, -16846656, 15430835, 199185034, -183754199, -2557127951, 2373373752, 35416852081, -33043478329, -526322279512, 493278801183, 8352696141782
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,5
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FORMULA
| a(0)=1; a(1)=-1; a(2*n)=n*a(2*n-1)+a(2*n-2); a(2*n+1)= - a(2*n)+a(2*n-1)
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CROSSREFS
| Cf. A056889.
Sequence in context: A147809 A096651 A114640 * A169590 A048825 A116375
Adjacent sequences: A056887 A056888 A056889 * A056891 A056892 A056893
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KEYWORD
| sign,frac,easy
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AUTHOR
| Aleksandar Petojevic (apetoje(AT)ptt.yu), Sep 05 2000
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EXTENSIONS
| More terms from James A. Sellers (sellersj(AT)math.psu.edu), Sep 06 2000 and from Larry Reeves (larryr(AT)acm.org), Sep 07 2000
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