

A147778


Positive integers of the form u*v*(u^2  v^2) where u, v are coprime integers.


3



6, 24, 30, 60, 84, 120, 180, 210, 240, 330, 336, 504, 546, 630, 720, 840, 924, 990, 1224, 1320, 1386, 1560, 1710, 1716, 2016, 2184, 2310, 2340, 2520, 2574, 2730, 3036, 3360, 3570, 3696, 3900, 3960, 4080, 4290, 4620, 4896, 4914, 5016, 5280, 5544, 5610, 5814
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OFFSET

1,1


COMMENTS

Terms with even u or v form A024365. Squarefree terms form A147779.


LINKS

Robert Israel, Table of n, a(n) for n = 1..10000


MAPLE

N:= 10^5:
A:= {}:
for v from 1 to floor((N/2)^(1/3)) do
for u from v+1 do
if igcd(u, v) = 1 then
t:= u*v*(u^2v^2);
if t > N then break fi;
A:= A union {t};
fi
od
od:
A;
# if using Maple 11 or earlier, uncomment the next line
# sort(convert(A, list)); # Robert Israel, Apr 06 2015


CROSSREFS

Subsequence of: A003273, A009112, A073120.
Sequence in context: A057228 A132398 A073120 * A209452 A275302 A201596
Adjacent sequences: A147775 A147776 A147777 * A147779 A147780 A147781


KEYWORD

nonn


AUTHOR

Max Alekseyev, Nov 12 2008


STATUS

approved



