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A351250 Numerator of n / A276086(n). 4

%I #13 Feb 06 2022 18:17:11

%S 0,1,2,1,4,5,6,7,8,3,2,11,12,13,14,1,16,17,18,19,4,7,22,23,24,1,26,9,

%T 28,29,30,31,32,11,34,5,36,37,38,13,8,41,6,43,44,3,46,47,48,7,2,17,52,

%U 53,54,11,8,19,58,59,60,61,62,3,64,65,66,67,68,23,2,71,72,73,74,1,76,11,78,79,16,27,82,83,12,17

%N Numerator of n / A276086(n).

%H Antti Karttunen, <a href="/A351250/b351250.txt">Table of n, a(n) for n = 0..30030</a>

%F a(n) = n / A324198(n) = n / gcd(n, A276086(n)).

%F a(n) = n / gcd(n, A328386(n)).

%t Array[Block[{i, m, n = #, p}, m = i = 1; While[n > 0, p = Prime[i]; m *= p^Mod[n, p]; n = Quotient[n, p]; i++]; Numerator[#/m]] &, 86, 0] (* _Michael De Vlieger_, Feb 06 2022 *)

%o (PARI)

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

%o A351250(n) = numerator(n/A276086(n));

%Y Cf. A276086, A324198, A328386, A328387 (positions of ones), A351251 (denominators).

%Y Cf. A324583 (the positions of fixed points after the zero).

%Y Cf. also A351230.

%K nonn,frac,easy

%O 0,3

%A _Antti Karttunen_, Feb 05 2022

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Last modified June 9 02:41 EDT 2024. Contains 373227 sequences. (Running on oeis4.)