

A015051


Let m = A013929(n); then a(n) = smallest k such that m divides k^4.


6



2, 2, 3, 6, 2, 6, 10, 6, 5, 3, 14, 4, 6, 10, 22, 15, 6, 7, 10, 26, 6, 14, 30, 21, 4, 34, 6, 15, 38, 10, 3, 42, 22, 30, 46, 12, 14, 33, 10, 26, 6, 14, 58, 39, 30, 11, 62, 5, 42, 4, 66, 15, 34, 70, 6, 21, 74, 30, 38, 51, 78, 20, 6, 82, 42, 13, 57, 86
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OFFSET

1,1


LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000
Henry Ibstedt, Surfing on the Ocean of Numbers, Erhus Univ. Press, Vail, 1997.


FORMULA

a(n) = A053166(A013929(n)).


MATHEMATICA

f[p_, e_] := p^Ceiling[e/4]; s[1] = 1; s[n_] := Times @@ f @@@ FactorInteger[n]; s /@ Select[Range[200], !SquareFreeQ[#] &] (* Amiram Eldar, Feb 10 2021 *)


CROSSREFS

Cf. A013929, A015050, A015049, A053166.
Sequence in context: A209157 A284785 A076333 * A260389 A291372 A064426
Adjacent sequences: A015048 A015049 A015050 * A015052 A015053 A015054


KEYWORD

nonn


AUTHOR

R. Muller


EXTENSIONS

Description corrected by Diego Torres (torresvillarroel(AT)hotmail.com), Jun 23 2002
Offset corrected by Amiram Eldar, Feb 10 2021


STATUS

approved



