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A366261 The least number with the same prime signature as A366260, where A366260 is Doudna sequence permuted by May code. 5

%I #14 Oct 06 2023 14:14:34

%S 1,2,4,2,4,2,6,8,16,2,6,12,6,8,4,12,24,2,6,12,6,12,6,30,24,32,4,12,36,

%T 12,16,8,16,2,6,12,6,12,6,30,24,48,6,30,60,30,24,12,60,48,4,12,36,12,

%U 36,12,60,72,64,8,24,72,24,32,64,2,6,12,6,12,6,30,24,48,6,30,60,30,24,12,60,120,6,30,60,30,60

%N The least number with the same prime signature as A366260, where A366260 is Doudna sequence permuted by May code.

%H Antti Karttunen, <a href="/A366261/b366261.txt">Table of n, a(n) for n = 0..16384</a>

%H <a href="/index/Bi#binary">Index entries for sequences related to binary expansion of n</a>

%F a(n) = A046523(A366260(n)).

%F a(n) = A278222(A303767(n)).

%F A001222(a(n)) = A366254(n).

%o (PARI)

%o A046523(n) = { my(f=vecsort(factor(n)[, 2], , 4), p); prod(i=1, #f,

%o A366261(n) = A046523(A366260(n)); \\ Needs also the program given in A366260.

%Y Cf. A005940, A046523, A303767, A366260, A366262 (rgs-transform).

%Y Cf. also A278219, A278222.

%K nonn

%O 0,2

%A _Antti Karttunen_, Oct 05 2023

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Last modified July 18 12:51 EDT 2024. Contains 374378 sequences. (Running on oeis4.)