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A328317
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Smallest prime not dividing A328316(n), with a(0) = 1 by convention; Equally, for n > 0, smallest prime dividing A328316(1+n).
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11
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1, 2, 3, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2
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OFFSET
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0,2
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COMMENTS
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a(2n+1) = 2 for all n >= 0. Does the pattern of 5's in the even bisection also continue?
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LINKS
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FORMULA
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PROG
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(PARI)
A276086(n) = { my(m=1, p=2); while(n, m *= (p^(n%p)); n = n\p; p = nextprime(1+p)); (m); };
\\ Or alternatively as:
A020639(n)=if(n>1, if(n>n=factor(n, 0)[1, 1], n, factor(n)[1, 1]), 1)
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CROSSREFS
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Cf. A020639, A053669, A276086, A326810, A328316, A328318, A328319, A328322, A328323, A328585, A328586, A328633.
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KEYWORD
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nonn,hard,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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