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A373158
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Fully additive with a(p) = p# for prime p, where x# is the primorial A034386(x).
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10
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0, 2, 6, 4, 30, 8, 210, 6, 12, 32, 2310, 10, 30030, 212, 36, 8, 510510, 14, 9699690, 34, 216, 2312, 223092870, 12, 60, 30032, 18, 214, 6469693230, 38, 200560490130, 10, 2316, 510512, 240, 16, 7420738134810, 9699692, 30036, 36, 304250263527210, 218, 13082761331670030, 2314, 42, 223092872, 614889782588491410, 14
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OFFSET
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1,2
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COMMENTS
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LINKS
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FORMULA
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(End)
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PROG
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(PARI) A373158(n) = { my(f=factor(n)); sum(i=1, #f~, f[i, 2]*prod(i=1, primepi(f[i, 1]), prime(i))); }; \\ corrected Jun 25 2024
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CROSSREFS
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Cf. also A000040, A000720, A002110, A003961, A034386, A108951, A276085, A276154, A373984 [= A108951(n)-a(n)], A373985 [= gcd(a(n), A108951(n))], A373986, A373987.
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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Data [first incorrect term was at a(8)] and the faulty PARI-program corrected by Antti Karttunen, Jun 25 2024
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STATUS
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approved
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