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Search: id:A121726
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| 1, 2, 6, 21, 85, 410, 2366, 16065, 125665, 1112074, 10976174, 119481285, 1421542629, 18348340114, 255323504918, 3809950976993, 60683990530209, 1027542662934898, 18430998766219318, 349096664728623317
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Also the row sums of A092271
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FORMULA
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a(n) = A006231(n) + 1 = A002104(n) - (n-1). - Frank Adams-Watters (FrankTAW(AT)Netscape.net), Aug 29 2006
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EXAMPLE
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A000522 begins 1 2 5 16 65 326 ...
with sums 1 3 8 24 89 415 ...
so
this sequence begins 1 2 6 21 85 410 ...
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PROGRAM
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(PARI) A000522(n)={ return( sum(k=0, n, n!/k!)) ; } A121726(n)={ return(sum(k=0, n-1, A000522(k))-n+1) ; } { for(n=1, 25, print1(A121726(n), ", ") ; ) ; } - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 02 2006
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CROSSREFS
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Cf. A000522, A006231, A002104.
Sequence in context: A087649 A123922 A099947 this_sequence A090805 A033540 A115089
Adjacent sequences: A121723 A121724 A121725 this_sequence A121727 A121728 A121729
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KEYWORD
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easy,nonn
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AUTHOR
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Alford Arnold (Alford1940(AT)aol.com), Aug 17 2006
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EXTENSIONS
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More terms from Frank Adams-Watters (FrankTAW(AT)Netscape.net), Aug 29 2006
More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 02 2006
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