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A159001 First part "a" of A159000(n). 1

%I #8 Mar 18 2024 03:26:44

%S 33,19,3,5,1209,39,4515,54,628,695,7,3008,374,5,17,46,5,119,1,193933,

%T 2438553,24,37,3776,54,582,1010472,1067915,2248,46,8080756,811,98

%N First part "a" of A159000(n).

%e A159000(1) = 3360 = phi(33)*sigma(60) so a(1) = 33.

%e A159000(5) = 451584 = phi(4515)*sigma(84) so a(5) = 4515.

%Y Cf. A000010, A000203, A159000.

%K nonn,base,more

%O 1,1

%A _Farideh Firoozbakht_, Jun 07 2009

%E a(3), a(4), a(11) and more terms added using A159000 by _Amiram Eldar_, Mar 18 2024

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Last modified April 19 23:15 EDT 2024. Contains 371798 sequences. (Running on oeis4.)