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9, 45, 63, 99, 117, 153, 171, 207, 261, 279, 289, 315, 333, 369, 387, 423, 477, 495, 531, 549, 585, 603, 639, 657, 676, 693, 711, 747, 765, 801, 819, 855, 873, 909, 927, 963, 981, 1017, 1035, 1071, 1143, 1179, 1197, 1233, 1251, 1287, 1305, 1341, 1359, 1395
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graph;
refs;
listen;
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text;
internal format)
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OFFSET
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1,1
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COMMENTS
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A055231(n) is the powerfree part of n. This sequence is infinite because all numbers of the form n = 9p, where p is a prime > 3, are in the sequence : A055231(9p) = p and A055231(9p - p) = A055231(8p) = p. The positive numbers of A055792 are also in the sequence because A055792(n) are squares and A055792(n)-1 are also squares.
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LINKS
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EXAMPLE
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MAPLE
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isA013929 := proc(n)
n>3 and not numtheory[issqrfree](n) ;
end proc:
isA207359 := proc(n)
end proc:
for n from 1 to 5000 do
if isA207359(n) then
printf(`%d, `, n);
end if;
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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