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A082053
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Sum of divisors of n that are not of the form 4k+3.
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1
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1, 3, 1, 7, 6, 9, 1, 15, 10, 18, 1, 25, 14, 17, 6, 31, 18, 36, 1, 42, 22, 25, 1, 57, 31, 42, 10, 49, 30, 54, 1, 63, 34, 54, 6, 88, 38, 41, 14, 90, 42, 86, 1, 73, 60, 49, 1, 121, 50, 93, 18, 98, 54, 90, 6, 113, 58, 90, 1, 150, 62, 65, 31, 127, 84, 130, 1, 126, 70, 102, 1, 192
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| a(A002145(n))=1.
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PROG
| (PARI) for(n=1, 100, print1(sumdiv(n, d, if(d%4!=3, d))", "))
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CROSSREFS
| Cf. A082052, A050449, A050452, A000203, A050460, A078181, A078182.
Sequence in context: A205298 A046913 A118228 * A136035 A132307 A188463
Adjacent sequences: A082050 A082051 A082052 * A082054 A082055 A082056
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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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