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A328635 Numbers n for which A328578(n) = A257993(A276086(A276086(n))) = 5. 3

%I #8 Oct 27 2019 17:32:49

%S 10,14,38,58,62,112,166,176,214,218,226,240,360,650,658,660,780,844,

%T 848,856,1080,1200,1280,1288,1474,1478,1486,1500,1620,1910,1918,1920,

%U 2040,2104,2108,2116,2312,2314,2318,2386,2396,2440,2450,2504,2520,2546,2580,2700,2732,2744,2752,2950,3000,3120,3176,3362,3374,3382,3420

%N Numbers n for which A328578(n) = A257993(A276086(A276086(n))) = 5.

%C Numbers n for which A276087(n) is a multiple of 210, but not of 11.

%H Antti Karttunen, <a href="/A328635/b328635.txt">Table of n, a(n) for n = 1..10000</a>

%H <a href="/index/Pri#primorialbase">Index entries for sequences related to primorial base</a>

%o (PARI)

%o A257993(n) = { for(i=1,oo,if(n%prime(i),return(i))); }

%o A276086(n) = { my(m=1, p=2); while(n, m *= (p^(n%p)); n = n\p; p = nextprime(1+p)); (m); };

%o A328578(n) = A257993(A276086(A276086(n)));

%o isA328635(n) = (5==A328578(n));

%Y Row 5 of A328631.

%Y Cf. A257993, A276086, A328578.

%K nonn

%O 1,1

%A _Antti Karttunen_, Oct 27 2019

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Last modified April 28 11:12 EDT 2024. Contains 372043 sequences. (Running on oeis4.)