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A278968
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Least number k such that pk is of minimal Hamming weight, where p is the n-th prime.
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2
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1, 1, 1, 1, 3, 5, 1, 27, 3, 565, 1, 7085, 25, 3, 11, 1266205, 9099507, 17602325, 128207979, 119, 1, 13
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OFFSET
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1,5
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LINKS
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PROG
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(PARI) min1s(p)=my(o=znorder(Mod(2, p)), v1=Set(powers(Mod(2, p), o)), v=v1, s=1); while(!setsearch(v, Mod(0, p)), v=setbinop((x, y)->x+y, v, v1); s++); s
a(n, p=prime(n))=my(m=min1s(p), t=p, k=2*p); while(hammingweight(t)>m, t+=k); t/p
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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