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Search: id:A072156
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| A072156 |
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Numerator of Sum_{k=1..n} phi(k)/k^2. |
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+0
2
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| 1, 5, 53, 115, 3163, 3263, 170687, 352399, 1096397, 223513, 28103473, 28459213, 4963286677, 5029541437, 25532475569, 51741301813, 15299527769557, 15415359085157, 5677532668504877, 1144538596366201, 1156827116999161, 1166157760248361, 626832724103131129
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OFFSET
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1,2
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EXAMPLE
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1, 5/4, 53/36, 115/72, 3163/1800, 3263/1800, 170687/88200, ...
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CROSSREFS
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Cf. A072157.
Sequence in context: A091272 A107004 A139869 this_sequence A101190 A106097 A075540
Adjacent sequences: A072153 A072154 A072155 this_sequence A072157 A072158 A072159
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KEYWORD
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nonn,frac
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AUTHOR
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njas, Jun 28 2002
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