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A065200
Numbers of the form n = m * p^k, with p prime, k >= 0, m squarefree and p > any prime factor of m.
11
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 21, 22, 23, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 41, 42, 43, 46, 47, 49, 50, 51, 53, 54, 55, 57, 58, 59, 61, 62, 64, 65, 66, 67, 69, 70, 71, 73, 74, 75, 77, 78, 79, 81, 82, 83, 85, 86, 87, 89, 91, 93
OFFSET
1,2
COMMENTS
a does not contain any arithmetic progression. The first 24 terms coincide with A053460.
EXAMPLE
a(17) = 18 = 2 * 3^2, whereas A065201(4) = 28 = 2^2 * 7 as 2
< 7.
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Oct 21 2001
EXTENSIONS
Edited by Franklin T. Adams-Watters, Oct 27 2006
STATUS
approved