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A305348
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a(n) is the smallest number k such that k * A002202(n) is not a term of A000010.
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0
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3, 7, 17, 15, 19, 5, 43, 19, 5, 17, 7, 167, 11, 3, 19, 67, 17, 17, 7, 5, 211, 7, 11, 13, 3, 139, 31, 9, 5, 109, 3, 85, 3, 61, 11, 7, 211, 11, 5, 7, 3, 31, 5, 31, 13, 353, 9, 31, 3, 71, 5, 3, 19, 317, 5, 3, 31, 167, 7, 7, 5, 71, 3, 59, 3, 53, 17, 5, 211, 11, 3, 17, 43, 19, 9
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OFFSET
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1,1
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COMMENTS
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a(n) is an odd number >= 3.
a(1) * A002202(1) = 3 is the only value not a term of the sequence A005277.
Terms of this sequence map terms of A002202 to terms of A005277 and the image of these mappings is a subset of A005277. For example, between A005277(1) = 14 and A005277(5) = 50, there is no mapping.
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LINKS
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Table of n, a(n) for n=1..75.
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EXAMPLE
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3 is a term because 3 * A002202(1) = 3 and 3 is not a term of A000010.
7 is a term because 7 * A002202(2) = 14 and 14 is not a term of A000010.
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PROG
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(PARI) f(n) = my(k=1); while(istotient(k*n), k++); k;
lista(nn) = {for (n=1, nn, if (istotient(n), print1(f(n), ", ")); ); } \\ Michel Marcus, Jun 01 2018
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CROSSREFS
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Cf. A000010, A002202, A005277.
Sequence in context: A000963 A133593 A297154 * A191147 A227211 A271725
Adjacent sequences: A305345 A305346 A305347 * A305349 A305350 A305351
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KEYWORD
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nonn
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AUTHOR
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Torlach Rush, May 30 2018
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EXTENSIONS
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More terms from Michel Marcus, Jun 01 2018
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STATUS
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approved
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