%I #10 Oct 16 2024 09:19:43

%S 2,5,13,19,61,107,521,1279,2281,4253,9689,11213,21701,44497,110503,

%T 216091,859433,1398269,3021377,13466917,24036583,30402457,37156667,

%U 43112609

%N Bisection of A000043.

%F a(n) = A000043(2*n-1). - _Amiram Eldar_, Oct 16 2024

%t MersennePrimeExponent[Range[1, 48, 2]] (* _Amiram Eldar_, Oct 16 2024 *)

%Y Cf. A000043, A099983.

%K nonn,more

%O 1,1

%A _N. J. A. Sloane_, Nov 19 2004

%E Offset corrected and a(20)-a(24) added by _Amiram Eldar_, Oct 16 2024