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Numbers included in A343983 but not in A074583.
0

%I #30 Aug 01 2023 15:34:20

%S 72,2025,78447,5922181,84238825,1141011175

%N Numbers included in A343983 but not in A074583.

%e If n is in A074583, n can be expressed as n = p^e (p>=e) using the prime p.

%e On the other hand, the terms of this sequence are factorized as follows.

%e 72 = 2^3 * 3^2.

%e 2025 = 3^4 * 5^2.

%e 78447 = 3 * 79 * 331.

%e 5922181 = 71 * 239 * 349.

%e 84238825 = 5^2 * 11 * 17 * 37 * 487.

%o (PARI) isok(n) = my(f=factor(n)); sumdiv(n, d, Mod(d, n)^d)==1 && n>1 && !(#f~==1 && f[1, 1]>=f[1, 2]);

%Y Cf. A074583, A343983.

%K nonn,more

%O 1,1

%A _Seiichi Manyama_, May 07 2021

%E a(6) from _Seiichi Manyama_, Aug 01 2023