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A082052
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Sum of divisors of n that are not of the form 4k+1.
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1
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0, 2, 3, 6, 0, 11, 7, 14, 3, 12, 11, 27, 0, 23, 18, 30, 0, 29, 19, 36, 10, 35, 23, 59, 0, 28, 30, 55, 0, 66, 31, 62, 14, 36, 42, 81, 0, 59, 42, 84, 0, 74, 43, 83, 18, 71, 47, 123, 7, 62, 54, 84, 0, 110, 66, 119, 22, 60, 59, 162, 0, 95, 73, 126, 0, 110, 67, 108, 26, 138, 71
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| a(A004613(n))=0.
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PROG
| (PARI) for(n=1, 100, print1(sumdiv(n, d, if(d%4!=1, d))", "))
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CROSSREFS
| Cf. A082053, A050449, A050452, A000203, A050460, A078181, A078182.
Sequence in context: A134972 A078890 A021813 * A107409 A178483 A133031
Adjacent sequences: A082049 A082050 A082051 * A082053 A082054 A082055
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KEYWORD
| nonn,easy
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AUTHOR
| Ralf Stephan (ralf(AT)ark.in-berlin.de), Apr 02 2003
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