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A140252
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Inverse binomial transform of A140420.
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0
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0, 1, 1, 7, 7, 31, 31, 127, 127, 511, 511, 2047, 2047, 8191, 8191, 32767, 32767, 131071, 131071, 524287, 524287, 2097151, 2097151, 8388607, 8388607, 33554431, 33554431, 134217727, 134217727, 536870911, 536870911
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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FORMULA
| a(2n+1)= a(2n+2)= A083420(n).
a(n+1)-2a(n) = (-1)^n*A014551(n), n>0.
a(n+1)-2a(n)-1 = 2*(-1)^n*A131577(n).
O.g.f.: x(1+2x^2)/((2x-1)(1+2x)(x-1)). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 02 2008
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CROSSREFS
| Sequence in context: A198341 A186142 A188274 * A095343 A121210 A154702
Adjacent sequences: A140249 A140250 A140251 * A140253 A140254 A140255
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KEYWORD
| nonn
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AUTHOR
| Paul Curtz (bpcrtz(AT)free.fr), Jun 23 2008
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EXTENSIONS
| Edited and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 02 2008
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