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a(n) is the least k > 0 such that A303822(k) = 3^n.
2

%I #11 May 03 2018 17:47:45

%S 1,2,6,4,12,60,36,180,1260,64,192,960,576,2880,20160,14400,100800,

%T 1108800,46656,233280,1632960,1166400,8164800,89812800,57153600,

%U 628689600,8172964800,16,48,240,144,720,5040,3600,25200,277200,5184,25920,181440,129600

%N a(n) is the least k > 0 such that A303822(k) = 3^n.

%C All terms belong to A025487.

%H Rémy Sigrist, <a href="/A303823/b303823.txt">Table of n, a(n) for n = 0..2131</a>

%H Rémy Sigrist, <a href="/A303823/a303823.gp.txt">PARI program for A303823</a>

%H Rémy Sigrist, <a href="/A303823/a303823.png">Scatterplot of (n, k) such that n, k <= 999 and a(k) divides a(n)</a>

%o (PARI) See Links section.

%Y Cf. A025487, A303822.

%K nonn

%O 0,2

%A _Rémy Sigrist_, May 01 2018