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A014421
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Odd elements in Pascal's triangle.
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3
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1, 1, 1, 1, 1, 1, 3, 3, 1, 1, 1, 1, 5, 5, 1, 1, 15, 15, 1, 1, 7, 21, 35, 35, 21, 7, 1, 1, 1, 1, 9, 9, 1, 1, 45, 45, 1, 1, 11, 55, 165, 165, 55, 11, 1, 1, 495, 495, 1, 1, 13, 715, 1287, 1287, 715, 13, 1, 1, 91, 1001, 3003, 3003, 1001, 91, 1, 1, 15, 105, 455, 1365, 3003, 5005
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,7
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MATHEMATICA
| Select[ Flatten[ Table[ Binomial[ n, i ], {n, 0, 20}, {i, 0, n} ] ], OddQ ]
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CROSSREFS
| Cf. A007318, A014414.
Cf. A143333. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 24 2010]
Sequence in context: A016554 A046533 A046532 * A127197 A114231 A079075
Adjacent sequences: A014418 A014419 A014420 * A014422 A014423 A014424
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KEYWORD
| nonn,easy,tabf
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AUTHOR
| Mohammad K. Azarian (ma3(AT)evansville.edu)
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EXTENSIONS
| More terms from Erich Friedman (erich.friedman(AT)stetson.edu).
Keyword tabl replaced by tabf by Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 21 2010
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