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Search: id:A004739
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| A004739 |
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Concatenation of sequences (1,2,2,..,n-1,n-1,n,n,n-1,n-1,..,2,2,1) for n >= 1. |
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+0
2
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| 1, 1, 1, 2, 2, 1, 1, 2, 3, 3, 2, 1, 1, 2, 3, 4, 4, 3, 2, 1, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 1, 2, 3, 4, 5, 6, 6, 5, 4, 3, 2, 1, 1, 2, 3, 4, 5, 6, 7, 7, 6, 5, 4, 3, 2, 1, 1, 2, 3, 4, 5, 6, 7, 8, 8, 7, 6, 5, 4, 3, 2, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 9, 8, 7, 6, 5, 4, 3, 2, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 9, 8, 7
(list; graph; listen)
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OFFSET
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1,4
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COMMENT
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Also called Smarandache Crescendo Symmetric Sequence.
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REFERENCES
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F. Smarandache, "Collected Papers", Vol. II, Tempus Publ. Hse., Bucharest, 1996; F. Smarandache, "Numerical Sequences", University of Craiova, 1975; [ See Arizona State University, Special Collection, Tempe, AZ, USA ].
F. Smarandache, Sequences of Numbers Involved in Unsolved Problems, Hexis, Phoenix, 2006.
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LINKS
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M. L. Perez et al., eds., Smarandache Notions Journal
Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
F. Smarandache, Collected Papers, Vol. II
F. Smarandache, Sequences of Numbers Involved in Unsolved Problems.
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CROSSREFS
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Cf. A004737, A004738, A004731.
Sequence in context: A025863 A136605 A165621 this_sequence A156282 A120423 A113137
Adjacent sequences: A004736 A004737 A004738 this_sequence A004740 A004741 A004742
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KEYWORD
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nonn,easy
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AUTHOR
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R. Muller
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EXTENSIONS
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More terms from Patrick De Geest (pdg(AT)worldofnumbers.com), Jun 15 1998.
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