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A007044
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Diagonal of partition triangle A047812.
(Formerly M4370)
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0
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0, 0, 1, 7, 20, 48, 100, 194, 352, 615, 1034, 1693, 2705, 4239, 6522, 9889, 14786, 21844, 31913, 46165, 66162, 94035, 132600, 185637, 258128, 356674, 489906, 669173
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,4
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REFERENCES
| R. K. Guy, Parker's permutation problem involves the Catalan numbers, Amer. Math. Monthly 100 (1993), 287-289.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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CROSSREFS
| Sequence in context: A011934 A159222 A100206 * A047862 A048755 A055267
Adjacent sequences: A007041 A007042 A007043 * A007045 A007046 A007047
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), R. K. Guy
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