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Search: id:A063005
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| A063005 |
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Difference between 2^n and the next smaller power of 3. |
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+0
4
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| 0, 1, 1, 5, 7, 5, 37, 47, 13, 269, 295, 1319, 1909, 1631, 9823, 13085, 6487, 72023, 84997, 347141, 517135, 502829, 2599981, 3605639, 2428309, 19205525, 24062143, 5077565, 139295293, 149450423, 686321335, 985222181, 808182895, 5103150191
(list; graph; listen)
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OFFSET
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0,4
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COMMENT
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Sequence generalized : a(n) = A^n - B^(floor(log_B (A^n))) where A, B are integers. This sequence has A = 2, B = 3; A056577 has A = 3, B = 2. - Ctibor O. Zizka (ctibor.zizka(AT)seznam.cz), Mar 03 2008
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FORMULA
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a(n) = 2^n - 3^(floor (log_3 (2^n)))
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PROGRAM
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(PARI) for(n=0, 50, print1(2^n-3^floor(log(2^n)/log(3))", "))
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CROSSREFS
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Cf. A056577, A063003, A063004.
Sequence in context: A121595 A125294 A139428 this_sequence A145577 A144478 A059249
Adjacent sequences: A063002 A063003 A063004 this_sequence A063006 A063007 A063008
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KEYWORD
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easy,nonn
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AUTHOR
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Jens Voss (jens.voss(AT)poet.de), Jul 02 2001
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EXTENSIONS
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More terms from Ralf Stephan (ralf(AT)ark.in-berlin.de), Mar 20 2003
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