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Search: id:A072286
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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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+0
2
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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; listen)
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OFFSET
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0,5
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COMMENT
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Entries are powers of 2.
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FORMULA
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a(n, m)=binomial(n-m/2+1, n-m+1)-binomial(n-m/2, n-m+1).
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MATHEMATICA
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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
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Cf. A072285, A071922.
Adjacent sequences: A072283 A072284 A072285 this_sequence A072287 A072288 A072289
Sequence in context: A120475 A086738 A058955 this_sequence A007375 A060865 A078689
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KEYWORD
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nonn,easy,frac,tabl
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AUTHOR
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Michele Dondi (bik.mido(AT)tiscalinet.it), Jul 11, 2002
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