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A066695
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Euler phi(n) / Carmichael lambda(n) = 12.
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0
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252, 273, 315, 364, 399, 468, 481, 532, 546, 630, 651, 665, 684, 693, 741, 756, 777, 793, 798, 855, 868, 903, 945, 949, 962, 988, 1001, 1036, 1071, 1085, 1116, 1204, 1209, 1261, 1281, 1287, 1302, 1330, 1332, 1386, 1395, 1404, 1407, 1417, 1449, 1463
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..46.
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MATHEMATICA
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Select[Range[2000], EulerPhi[#]/CarmichaelLambda[#] == 12 &] (* Alonso del Arte, Apr 17 2017 *)
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PROG
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(PARI) {cmf(f)=if( ((f[1]==2)&&(f[2]>2)), eulerphi(f[1]^f[2])/2, eulerphi(f[1]^f[2])) }
{cl(f)= k=factor(f); l=1; for(x=1, omega(f), l=lcm(l, cmf([k[x, 1], k[x, 2]]))); l }
{A0(n)=eulerphi(n)/cl(n)}
for(x=1, 10001, if(A0(x)==12, print1(x, ", ")))
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CROSSREFS
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Continuation of A062373, A062374, A062375, A062376, A062377
Sequence in context: A113899 A045182 A046331 * A104396 A207373 A072443
Adjacent sequences: A066692 A066693 A066694 * A066696 A066697 A066698
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KEYWORD
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easy,nonn
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AUTHOR
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Randall L. Rathbun, Jan 12 2002
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STATUS
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approved
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