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Search: id:A026726
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| 1, 2, 7, 27, 108, 440, 1812, 7514, 31307, 130883, 548547, 2303413, 9686617, 40783083, 171868037, 724837891, 3058850316, 12915186640, 54554594416, 230526280814, 974414815782, 4119854160332, 17422801069670, 73695109608352
(list; graph; listen)
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OFFSET
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0,2
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REFERENCES
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Paul Barry, A Catalan Transform and Related Transformations on Integer Sequences, Journal of Integer Sequences, Vol. 8 (2005), Article 05.4.5.
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FORMULA
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a(n)= sum{k=0..n, A039599(n,k)*A000045(k+1)}. [From Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Feb 11 2009]
a(n)=Sum_{k, 0<=k<=n}A106566(n,k)*A122367(k). [From Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Feb 11 2009]
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CROSSREFS
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Sequence in context: A150594 A150595 A150596 this_sequence A150597 A150598 A026759
Adjacent sequences: A026723 A026724 A026725 this_sequence A026727 A026728 A026729
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KEYWORD
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nonn
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AUTHOR
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Clark Kimberling (ck6(AT)evansville.edu)
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