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Search: id:A008308
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| A008308 |
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Triangle of tangent numbers. |
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+0
2
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| 1, 1, 2, 1, 8, 1, 16, 20, 1, 136, 40, 1, 272, 616, 70, 1, 3968, 2016, 112, 1, 7936, 28160, 5376, 168, 1, 176896, 135680, 12432, 240, 1, 353792, 1805056, 508640, 25872, 330, 1, 11184128, 11977856, 1595264, 49632, 440, 1, 22368256, 154918400, 59835776
(list; graph; listen)
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OFFSET
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1,3
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REFERENCES
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L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 259.
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EXAMPLE
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1; 1; 2,1; 8,1; 16,20,1; 136,40,1; ...
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CROSSREFS
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Essentially the same triangle as A059419, which is the main entry for this triangle.
Sequence in context: A102208 A125911 A009385 this_sequence A118931 A101280 A008309
Adjacent sequences: A008305 A008306 A008307 this_sequence A008309 A008310 A008311
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KEYWORD
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tabf,nonn,nice
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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More terms from Larry Reeves (larryr(AT)acm.org), Feb 08 2001
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