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Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
Only 2 squares, 1 and 9, are <= 14 and relatively prime to 14. So a(14) = 2.
a057828 x = length $ filter ((== 1) . (gcd x)) $
takeWhile (<= x) $ tail a000290_list
-- Reinhard Zumkeller, Jul 22 2012
Cf. A000290, A010051.
Sequence in context: A124830 A191373 A026904 * A082498 A112223 A178771
Adjacent sequences: A057825 A057826 A057827 * A057829 A057830 A057831
Leroy Quet, Nov 08 2000