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1, 2, 2, 3, 2, 3, 2, 4, 5, 3, 2, 4, 2, 3, 5, 6, 2, 7, 2, 4, 5, 3, 2, 6, 3, 3, 8, 4, 2, 7, 2, 9, 5, 3, 3, 10, 2, 3, 5, 6, 2, 7, 2, 4, 8, 3, 2, 9, 5, 4, 5, 4, 2, 11, 3, 6, 5, 3, 2, 10, 2, 3, 8, 12, 3, 7, 2, 4, 5, 4, 2, 13, 2, 3, 4, 4, 5, 7, 2, 9, 14, 3, 2, 10, 3, 3, 5, 6, 2, 11, 5, 4, 5, 3, 3, 12, 2, 7, 8, 6, 2, 7, 2, 6, 4
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OFFSET
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1,2
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COMMENTS
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Restricted growth sequence transform of the ordered pair [A336312(n), A336313(n)].
For all i, j:
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LINKS
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PROG
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(PARI)
up_to = 1024;
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; };
A005940(n) = { my(p=2, t=1); n--; until(!n\=2, if((n%2), (t*=p), p=nextprime(p+1))); t }; \\ From A005940
A046523(n) = { my(f=vecsort(factor(n)[, 2], , 4), p); prod(i=1, #f, (p=nextprime(p+1))^f[i]); }; \\ From A046523
v336311 = rgs_transform(vector(up_to, n, Aux336311(n)));
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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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