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1, 2, 2, 60, 2, 2520, 60, 138600, 2, 87318000, 2520, 189189000, 60, 792148896000000, 138600, 70756686000, 2, 2288271225240000, 87318000, 944154902157667200000000, 2520, 20388496616888400000000, 189189000, 127170673342713000000, 60, 701323506627727183200000000, 792148896000000, 21149759041410320377056000000000000000, 138600
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refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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COMMENTS
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Observation: the restricted growth sequence computed for this sequence seems to give A103391 (apart from the fact that the latter uses starting offset 1 instead of 0. Checked up to n=2048). If this holds, then A103391 works as a more practical filtering sequence (than this sequence, with its huge terms) matching for example to sequences like A286387. Compare also to A286378.
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LINKS
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FORMULA
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PROG
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(PARI)
A046523(n) = { my(f=vecsort(factor(n)[, 2], , 4), p); prod(i=1, #f, (p=nextprime(p+1))^f[i]); }; \\ This function from Charles R Greathouse IV, Aug 17 2011
A003961(n) = my(f = factor(n)); for (i=1, #f~, f[i, 1] = nextprime(f[i, 1]+1)); factorback(f); \\ This function from Michel Marcus
for(n=0, 256, write("b286377.txt", n, " ", A286377(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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