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Search: id:A085885
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| A085885 |
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Let r and s be such that r + s = n; a(n) = maximum value of phi(r) + phi(s). |
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+0
2
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| 2, 2, 3, 3, 5, 5, 7, 7, 8, 8, 11, 11, 13, 13, 14, 14, 17, 17, 19, 19, 20, 20, 23, 23, 24, 24, 26, 24, 29, 29, 31, 31, 32, 32, 34, 32, 37, 37, 38, 38, 41, 41, 43, 43, 44, 44, 47, 47, 48, 48, 50, 48, 53, 53, 54, 54, 56, 54, 59, 59, 61, 61, 62, 62, 64, 62, 67, 67, 68, 68, 71, 71, 73
(list; graph; listen)
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OFFSET
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2,1
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EXAMPLE
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a(8) = 7, the partitions are ( 1,7),(2,6),(3,5),(4,4) which give 7, 3, 6,4 as the sum of phi functions of both the parts.
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CROSSREFS
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Sequence in context: A035032 A121260 A121261 this_sequence A064986 A029019 A040039
Adjacent sequences: A085882 A085883 A085884 this_sequence A085886 A085887 A085888
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jul 08 2003
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EXTENSIONS
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More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Feb 10 2005
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