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Search: id:A060719
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| A060719 |
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a(0) = 1; a(n+1) = a(n) + Sum_{i=0..n} binomial(n,i)*(a(i)+1). |
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+0
3
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| 1, 3, 9, 29, 103, 405, 1753, 8279, 42293, 231949, 1357139, 8427193, 55288873, 381798643, 2765917089, 20960284293, 165729739607, 1364153612317, 11665484410113, 103448316470743, 949739632313501, 9013431476894645, 88304011710168691
(list; graph; listen)
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OFFSET
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0,2
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FORMULA
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a(n) = 2*Bell(n+1)-1. - Vladeta Jovovic (vladeta(AT)Eunet.yu), Feb 11 2003
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MAPLE
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A060719 := proc(n) option remember; local i; if n=0 then 1 else A060719(n-1)+add(binomial(n-1, i)*(A060719(i)+1), i=0..n-1); fi; end;
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CROSSREFS
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Cf. A000110.
Sequence in context: A109432 A148943 A148944 this_sequence A091152 A148945 A136628
Adjacent sequences: A060716 A060717 A060718 this_sequence A060720 A060721 A060722
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KEYWORD
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easy,nonn
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AUTHOR
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Frank Ellermann (Frank.Ellermann(AT)t-online.de), Apr 23 2001
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