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A127276
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Hankel transform of A127275.
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6
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1, 1, -2, -16, -64, -208, -608, -1664, -4352, -11008, -27136, -65536, -155648, -364544, -843776, -1933312, -4390912, -9895936, -22151168, -49283072, -109051904, -240123904, -526385152, -1149239296, -2499805184, -5419040768
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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COMMENTS
| The inverse binomial transform of this sequence yields 1, 0, -3, -8,..., which is 1 followed by the negated terms of A005563. [Paul Curtz, Dec 07 2010]
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..1000
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FORMULA
| Conjecture: G.f. -(4*x-1)*(x-1) / ( (2*x-1)^3 ) and a(n) = 2^n-n*(n+1)*2^(n-2). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Dec 11 2010
a(n) = A178987(n)-A178987(n+1). - Klaus Brockhaus, Jan 08 2011
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PROG
| (MAGMA) [2^n-n*(n+1)*2^(n-2): n in [0..30]]; // Vincenzo Librandi, Aug 11 2011
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CROSSREFS
| Cf. A076616.
Sequence in context: A152665 A183762 A061608 * A076616 A110048 A094505
Adjacent sequences: A127273 A127274 A127275 * A127277 A127278 A127279
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KEYWORD
| sign
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AUTHOR
| Paul Barry (pbarry(AT)wit.ie), Jan 10 2007
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