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1, 1, 2, 1, 2, 3, 3, 1, 2, 4, 5, 5, 2, 2, 5, 1, 2, 5, 5, 6, 5, 2, 5, 7, 2, 3, 8, 2, 5, 9, 5, 1, 2, 6, 9, 5, 5, 5, 5, 10, 2, 2, 10, 5, 2, 5, 11, 9, 2, 5, 9, 2, 9, 11, 9, 5, 2, 12, 10, 10, 2, 2, 5, 1, 5, 13, 12, 5, 9, 5, 14, 10, 5, 2, 10, 2, 5, 5, 12, 15, 2, 2, 10, 3, 10, 12, 9, 2, 2, 16, 5, 12, 10, 2, 5, 5, 2, 5, 5, 9, 5, 5, 10, 5, 2
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,3
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COMMENTS
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LINKS
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PROG
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(PARI)
up_to = 65537;
rgs_transform(invec) = { my(om = Map(), outvec = vector(length(invec)), u=1); for(i=1, length(invec), if(mapisdefined(om, invec[i]), my(pp = mapget(om, invec[i])); outvec[i] = outvec[pp] , mapput(om, invec[i], i); outvec[i] = u; u++ )); outvec; };
A002110(n) = prod(i=1, n, prime(i));
A276156(n) = { my(p=2, pr=1, s=0); while(n, if(n%2, s += pr); n >>= 1; pr *= p; p = nextprime(1+p)); (s); };
A046523(n) = { my(f=vecsort(factor(n)[, 2], , 4), p); prod(i=1, #f, (p=nextprime(p+1))^f[i]); }; \\ From A046523
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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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