The number of base-2 Euler-Jacobi pseudoprimes (A047713) less than 2^n.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =1a(10) =5a(11) =8a(12) =10a(13) =15a(14) =20a(15) =29a(16) =42a(17) =57a(18) =81a(19) =118a(20) =179a(21) =246a(22) =348a(23) =481a(24) =654a(25) =893a(26) =1231a(27) =1642a(28) =2188a(29) =3003