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A350321
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Totient numbers k such that 14*k is a nontotient.
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5
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1, 22, 46, 52, 82, 148, 172, 178, 190, 250, 262, 292, 310, 358, 366, 382, 388, 442, 466, 490, 502, 506, 556, 562, 568, 586, 598, 652, 658, 682, 718, 742, 772, 822, 852, 862, 910, 946, 982, 1090, 1102, 1150, 1162, 1186, 1210, 1222, 1278, 1282, 1306, 1366, 1372
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OFFSET
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1,2
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COMMENTS
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14 is the smallest even nontotient.
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LINKS
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Table of n, a(n) for n=1..51.
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EXAMPLE
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52 is a term since 52 = phi(53) = phi(106), but phi(n) = 14*52 = 728 has no solution.
172 is a term since 172 = phi(173) = phi(346), but phi(n) = 14*172 = 2408 has no solution.
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PROG
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(PARI) isA350321(n) = istotient(n) && !istotient(14*n)
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CROSSREFS
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Totient numbers k such that m*k is a nontotient: A350316 (m=3), A350317 (m=5), A350318 (m=7), A350319 (m=9), A350320 (m=10), this sequence (m=14).
Cf. A002202, A005277.
Sequence in context: A041962 A041964 A041966 * A106838 A190614 A281187
Adjacent sequences: A350318 A350319 A350320 * A350322 A350323 A350324
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KEYWORD
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nonn
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AUTHOR
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Jianing Song, Dec 24 2021
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STATUS
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approved
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