A358843 - OEIS

%I #9 Dec 03 2022 11:54:54

%S 6,18,36,48,66,78,96,108,126,138,156,168,186,198,210,222,234,240,252,

%T 264,270,282,294,300,312,324,330,342,354,360,372,384,390,402,414,426,

%U 438,456,468,486,498,516,528,546,558,576,588,606,618,630,642,654,660,672,684,690,702,714,720,732,744,750

%N Numbers k such that A276086(k) == 5 (mod 6), where A276086 is the primorial base exp-function.

%H <a href="/index/Pri#primorialbase">Index entries for sequences related to primorial base</a>

%F {k | A358840(k) == 5}.

%F a(n) = 6*A358844(n).

%o (PARI) isA358843(n) = A358842(n);

%Y Positions of 5's in A358840. Setwise difference A008588 \ A328632.

%Y Cf. A358842 (characteristic function), A358844 (a(n)/6), A328586 (subsequence).

%K nonn

%O 1,1

%A _Antti Karttunen_, Dec 02 2022