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A217142
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Least number m such that phi(m) = phi(m+6n) and m is not divisible by n.
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1
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143, 52, 101, 124, 104, 123, 183, 156, 248, 144, 208, 267, 241, 365, 219, 248, 312, 306, 496, 369, 288, 432, 241, 543, 369, 468, 482, 386, 730, 444, 438, 432, 496, 1220, 624, 779, 612, 801, 915, 744, 723, 582, 576, 1095, 864, 488, 482, 641, 1086, 674, 738
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OFFSET
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2,1
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LINKS
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PROG
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(PARI) fpr(Nmax, lim) = {for (i=2, Nmax, N = i*6; op = vector(N); f = 0; for (n=1, lim, if (op[n%N+1]+0==op[n%N+1]=eulerphi(n), if ((n-N) % i != 0, f = n-N; break; ); ); ); print1(f, ", "); ); }
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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