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a(n) = A230624(n)/2.
4

%I #8 Dec 31 2021 17:19:02

%S 0,1,5,7,11,19,31,47,79,103,159,191,239,303,383,479,511,767,831,863,

%T 895,959,991,1119,1311,1343,1503,1631,1791,1983,2367,2559,2687,2879,

%U 2943,3391,4415,4671,4735,4799,5439,6463,6591,6719,7359,9343,11263,12415,21503,23039,36607,50687,51967,56319,56831,63231,64767

%N a(n) = A230624(n)/2.

%C The definition of A230624 implies that all its terms are even.

%Y Cf. A230624, A349820.

%K nonn

%O 1,3

%A _N. J. A. Sloane_, Dec 30 2021.