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A055932(n) is the a(n)-th positive integer having its distinct prime factors.
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%I #5 May 09 2021 09:48:35

%S 1,1,2,1,3,2,4,3,4,1,5,5,6,7,2,6,8,3,9,10,4,7,11,5,12,6,13,1,14,7,8,8,

%T 15,9,16,10,17,2,18,11,12,19,9,13,20,14,3,21,15,16,22,17,4,23,18,19,

%U 24,10,5,20,25,21,6,26,22,23,27,7,24,28,25,8,29,26,9

%N A055932(n) is the a(n)-th positive integer having its distinct prime factors.

%e a(7) = 4 as 16 = A055932(7) and has distinct prime factors 2 which is the fourth positive integer with those distinct prime factors are 2 (after 2, 4 and 8).

%Y Cf. A008479, A055932.

%K nonn

%O 1,3

%A _David A. Corneth_, May 09 2021