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Search: id:A020740
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| A020740 |
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Max_{k=0..n} d(C(n,k)) - d(C(n,[ n/2 ])), where d() = number of divisors. |
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+0
3
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| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 12, 16, 32, 0, 0, 0, 64, 48, 0, 0, 96, 0, 0, 0, 192, 256, 0, 256, 384, 0, 0, 0, 0, 0, 832, 768, 512, 0, 0, 0, 0, 384, 576, 1536, 3072, 2048, 8448, 7680, 5632, 0, 0, 0, 14336, 3584, 0, 0, 3072
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OFFSET
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1,18
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EXAMPLE
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n=20, d(C[ 20,10 ])= 48 and the d(C[ 20,k ]) values are 1,6,8,16,24,40,64,80. The maximum is 80, so the difference is 80-48 = 32.
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CROSSREFS
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Cf. A000005, A048485, A048569.
Sequence in context: A077617 A157678 A109240 this_sequence A086980 A058203 A050585
Adjacent sequences: A020737 A020738 A020739 this_sequence A020741 A020742 A020743
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu)
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