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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A190125 If n = product(p_i^e_i), a(n) = product((p_i^e_i)^(p_i^e_i)).

Original entry on oeis.org

1, 4, 27, 256, 3125, 108, 823543, 16777216, 387420489, 12500, 285311670611, 6912, 302875106592253, 3294172, 84375, 18446744073709551616, 827240261886336764177, 1549681956, 1978419655660313589123979, 800000, 22235661, 1141246682444
Offset: 1

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Author

Franklin T. Adams-Watters, May 05 2011

Keywords

Comments

Multiplicative with a(p^e) = (p^e)^(p^e) = p^(e*p^e).
Equivalently, product over pp a unitary prime power divisor of n of pp^pp.

Crossrefs

Cf. A133482.

Programs

  • PARI
    a(n)=local(fm,pp);fm=factor(n);prod(k=1,matsize(fm)[1],(pp=fm[k,1]^fm[k,2])^pp)
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