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A072286
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Denominators of inverse unimodal analogue of binomial coefficients: binomial(n,m)=sum_{k=0}^{n-m} a(2k+m-1,2k).
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1
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1, 1, 1, 1, 2, 1, 1, 8, 1, 1, 1, 16, 1, 2, 1, 1, 128, 1, 8, 1, 1, 1, 256, 1, 16, 1, 2, 1, 1, 1024, 1, 128, 1, 8, 1, 1, 1, 2048, 1, 256, 1, 16, 1, 2, 1, 1, 32768, 1, 1024, 1, 128, 1, 8, 1, 1, 1, 65536, 1, 2048, 1, 256, 1, 16, 1, 2, 1, 1, 262144, 1, 32768, 1, 1024, 1, 128, 1, 8, 1, 1
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,5
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COMMENTS
| Entries are powers of 2.
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FORMULA
| a(n, m)=binomial(n-m/2+1, n-m+1)-binomial(n-m/2, n-m+1).
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MATHEMATICA
| a[n_, m_] := Binomial[n - m/2 + 1, n - m + 1] - Binomial[n - m/2, n - m + 1]; Flatten[Table[Denominator[a[n, m]], {n, 0, 11}, {m, 0, n}]]
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CROSSREFS
| Cf. A072285, A071922.
Sequence in context: A198941 A058955 A176055 * A007375 A060865 A078689
Adjacent sequences: A072283 A072284 A072285 * A072287 A072288 A072289
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KEYWORD
| nonn,easy,frac,tabl
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AUTHOR
| Michele Dondi (bik.mido(AT)tiscalinet.it), Jul 11, 2002
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