A355942 - OEIS

%I #6 Jul 23 2022 19:25:03

%S 1,2,5,6,10,14,24,29,30,38,55,58,70,86,102,110,113,120,145,168,174,

%T 190,220,226,261,290,312,330,362,370,406,430,438,456,510,522,565,574,

%U 660,678,696,758,770,790,840,870,1032,1055,1102,1130,1305,1320,1540,1560,1582,1595,1608,1630,1711,1810,2030,2088,2090,2110

%N Numbers k such that k is a multiple of A326042(k).

%C If both x and y are terms and gcd(x, y) = 1, then x*y is also present.

%C Applying A003961 to these terms and sorting into ascending order gives A348943.

%H <a href="/index/Pri#prime_indices">Index entries for sequences computed from indices in prime factorization</a>

%H <a href="/index/Si#SIGMAN">Index entries for sequences related to sigma(n)</a>

%F {k | A326042(k) divides k}.

%o (PARI) A355942(n) = (1==A348942(n));

%Y Positions of 1's in A348942.

%Y Cf. A000203, A003961, A064989, A326042, A348943.

%K nonn

%O 1,2

%A _Antti Karttunen_, Jul 23 2022