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A296091 a(1) = 1 and for n > 1, the least number with the same prime signature as sigma(n)-1.

%I A296091 #6 Dec 08 2017 16:58:59
%S A296091 1,2,2,6,2,2,2,6,12,2,2,8,2,2,2,30,2,6,2,2,2,6,2,2,30,2,6,6,2,2,2,6,2,
%T A296091 2,2,60,2,2,6,2,2,6,2,2,6,2,2,6,24,12,2,2,2,6,2,6,2,2,2,2,2,6,2,60,2,
%U A296091 6,2,8,6,6,2,6,2,2,6,2,6,2,2,6,120,8,2,2,2,2,6,2,2,2,6,2,2,6,6,2,2,30,6,216,2,6,2,6,2
%N A296091 a(1) = 1 and for n > 1, the least number with the same prime signature as sigma(n)-1.
%H A296091 Antti Karttunen, <a href="/A296091/b296091.txt">Table of n, a(n) for n = 1..65537</a>
%F A296091 a(1) = 1; for n > 1, a(n) = A046523(A000203(n)-1) = A046523(A039653(n)).
%o A296091 (Scheme) (define (A296091 n) (if (= 1 n) n (A046523 (+ -1 (A000203 n)))))
%Y A296091 Cf. A000203, A039653, A046523, A296211.
%Y A296091 Cf. also A276528, A296092.
%K A296091 nonn
%O A296091 1,2
%A A296091 _Antti Karttunen_, Dec 07 2017