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Search: id:A078861
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| A078861 |
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Least positive residues [mod 210] representing those residue classes which can be smaller prime of a difference 6 taken from A031924. |
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+0
2
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| 11, 13, 17, 23, 31, 37, 41, 47, 53, 61, 67, 73, 83, 97, 101, 103, 107, 121, 131, 137, 143, 151, 157, 163, 167, 173, 181, 187, 191, 193
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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Intersection[RRS(210), 6+RRS{210)]-6. RRS[210]=reduced residue system of 210=first 48=phi[210] terms of A008364; 210k+r generates complete A031924 with suitable k and r taken from these 30 numbers.
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MATHEMATICA
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t=Flatten[Position[Table[GCD[w, 210], {w, 1, 210}], 1]] t2=Intersection[t, t+6]-6
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CROSSREFS
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Cf. A031924, A008364, A078859, A078860.
Sequence in context: A087681 A137669 A152470 this_sequence A106891 A106890 A048058
Adjacent sequences: A078858 A078859 A078860 this_sequence A078862 A078863 A078864
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KEYWORD
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fini,full,nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Dec 13 2002
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