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A064611
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Partial sum of usigma is divisible by n, where usigma(n)=A034448(n) and summatory-usigma(n)=A064611(n).
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6
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1, 2, 8, 11, 12, 174, 212, 524, 1567, 14096, 19795, 38466, 42114, 55575, 338809, 498001
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OFFSET
| 1,2
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COMMENTS
| Analogous sequences for various arithmetical functions are A050226, A056650, A064605-A064607, A064610, A064612, A048290, A062982, A045345.
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FORMULA
| Mod[A064609(n), n]=0
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EXAMPLE
| udivisor sums[=usigma(j) values] from 1 to 8 are added: 1+3+4+5+6+12+8+9=48; it is divisible by 8, thus 8 is here.
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CROSSREFS
| A034448, A064609 A050226, A056650, A064605-A064607, A064610-A064612, A048290, A062982, A045345.
Sequence in context: A081231 A121715 A121714 * A059011 A077820 A045086
Adjacent sequences: A064608 A064609 A064610 * A064612 A064613 A064614
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KEYWORD
| nonn
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu), Sep 24 2001
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