A377776 - OEIS

%I #5 Nov 13 2024 17:25:14

%S 1,1,3,1,1,3,1,1,3,7,1,3,1,5,3,1,1,3,1,5,5,1,3,3,1,1,3,7,3,15,7,1,3,1,

%T 1,9,1,1,3,1,9,5,13,1,3,3,1,3,7,1,3,9,1,3,3,1,3,1,7,3,67,5,17,1,1,3,1,

%U 1,5,9,1,3,19,5,5,1,21,9,15,1,3,1,3,9,1

%N a(n) = A377775(n)/(2*n+1).

%C a(n) = 1 if and only if 2*n+1 is in A000959.

%H Pontus von Brömssen, <a href="/A377776/b377776.txt">Table of n, a(n) for n = 0..9999</a>

%Y Cf. A000959, A377775, A377778.

%K nonn

%O 0,3

%A _Pontus von Brömssen_, Nov 07 2024