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A278264 Least number with the same prime signature as the n-th term in the inverse of EKG-sequence: a(n) = A046523(A064664(n)). 2

%I #11 Nov 19 2016 08:31:05

%S 1,2,2,2,6,4,6,8,6,4,12,2,12,2,2,2,6,12,2,12,6,2,2,16,24,8,6,6,6,2,2,

%T 2,6,32,4,30,2,36,2,24,6,6,16,2,6,30,2,12,12,6,6,2,36,48,2,4,6,24,2,

%U 12,6,60,6,64,24,2,128,6,12,6,6,12,30,30,6,2,30,30,2,72,12,2,96,6,60,48,6,2,2,2,6,6,6,24,6,6,30,12,96,6,24,6,2,6,2,12,6

%N Least number with the same prime signature as the n-th term in the inverse of EKG-sequence: a(n) = A046523(A064664(n)).

%C This sequence works as a "sentinel" for the inverse of EKG-sequence by matching to any other sequence that is obtained as f(A064664(n)), where f(n) is any function that depends only on the prime signature of n (see the index entry for "sequences computed from exponents in ..."). As of Nov 11 2016 no such sequences were present in the database.

%C Terms and b-file computed from b-file of A064664 provided by _T. D. Noe_ and _Ray Chandler_.

%H Antti Karttunen, <a href="/A278264/b278264.txt">Table of n, a(n) for n = 1..10000</a>

%H <a href="/index/Eu#epf">Index entries for sequences computed from exponents in factorization of n</a>

%F a(n) = A046523(A064664(n)).

%o (Scheme) (define (A278264 n) (A046523 (A064664 n)))

%Y Cf. A046523, A064664, A278263.

%K nonn

%O 1,2

%A _Antti Karttunen_, Nov 16 2016

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Last modified April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)