login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

Positions of zeros in A365711, where A365711 is the Dirichlet inverse of balanced ternary enumeration of integers (A117966).
2

%I #7 Oct 07 2023 21:40:13

%S 9,18,20,27,36,45,54,60,63,72,80,81,90,99,108,117,126,135,144,153,162,

%T 171,180,189,198,207,216,225,234,240,243,252,261,270,279,288,297,306,

%U 315,324,333,338,342,351,360,369,378,387,396,405,414,423,432,441,450,459,468,477,486,495,504,513,522,531,540,549

%N Positions of zeros in A365711, where A365711 is the Dirichlet inverse of balanced ternary enumeration of integers (A117966).

%C Apparently, if n is included, then 3*n is also included.

%o (PARI) isA366290(n) = A366289(n);

%Y Cf. A117966, A365711, A366289 (characteristic function).

%Y Positions of 5's in A366293.

%Y Subsequence of A366288.

%K nonn

%O 1,1

%A _Antti Karttunen_, Oct 07 2023