A296091 - OEIS

%I #6 Dec 08 2017 16:58:59

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

%H Antti Karttunen, <a href="/A296091/b296091.txt">Table of n, a(n) for n = 1..65537</a>

%F a(1) = 1; for n > 1, a(n) = A046523(A000203(n)-1) = A046523(A039653(n)).

%o (Scheme) (define (A296091 n) (if (= 1 n) n (A046523 (+ -1 (A000203 n)))))

%Y Cf. A000203, A039653, A046523, A296211.

%Y Cf. also A276528, A296092.

%K nonn

%O 1,2

%A _Antti Karttunen_, Dec 07 2017