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A075374
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a(1)=1, a(2)=2, a(n+1) = (a(n)+a(n+2))/n or a(n+2) = n*a(n+1)-a(n).
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4
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1, 2, 1, 0, -1, -4, -19, -110, -751, -5898, -52331, -517412, -5639201, -67153000, -867349799, -12075744186, -180268812991, -2872225263670, -48647560669399, -872783866785512, -16534245908255329, -329812134298321068, -6909520574356487099, -151679640501544395110
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Starting with offset 5 unsigned: (1, 4, 19, 110, 751,...) = eigensequence of triangle A075374. [From Gary W. Adamson (qntmpkt(AT)yahoo.com), May 17 2010]
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MAPLE
| a[1] := 1:a[2] := 2:for n from 1 to 45 do a[n+2] := n*a[n+1]-a[n]:od:seq(a[i], i=1..45);
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CROSSREFS
| Cf. A075374 [From Gary W. Adamson (qntmpkt(AT)yahoo.com), May 17 2010]
Sequence in context: A004248 A034373 A102728 * A066603 A119331 A151824
Adjacent sequences: A075371 A075372 A075373 * A075375 A075376 A075377
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KEYWORD
| sign
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 20 2002
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EXTENSIONS
| More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Jan 30 2003
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