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A056889
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Numerators of continued fraction for left factorial.
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1
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0, 1, 1, 0, 1, -1, -2, 1, 2, -1, -3, 2, 9, -7, -40, 33, 224, -191, -1495, 1304, 11545, -10241, -101106, 90865, 989274, -898409, -10690043, 9791634, 126392833, -116601199, -1622625152, 1506023953, 22473758096, -20967734143, -333977722335, 313009988192, 5300202065121, -4987192076929
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,7
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FORMULA
| a(0) = 0; 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. A056890.
Sequence in context: A029198 A029175 A186994 * A039636 A078899 A055172
Adjacent sequences: A056886 A056887 A056888 * A056890 A056891 A056892
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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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