Central terms of the rows of the XOR difference triangle of the powers of 2 (A099884) so that a(n) = A099884(n, floor(n/2)).

A099885

Central terms of the rows of the XOR difference triangle of the powers of 2 (A099884) so that a(n) = A099884(n, floor(n/2)).

Terms

    a(0) =1a(1) =2a(2) =6a(3) =12a(4) =20a(5) =40a(6) =120a(7) =240a(8) =272a(9) =544a(10) =1632a(11) =3264a(12) =5440a(13) =10880a(14) =32640a(15) =65280a(16) =65792a(17) =131584a(18) =394752a(19) =789504a(20) =1315840a(21) =2631680a(22) =7895040a(23) =15790080a(24) =17895424a(25) =35790848a(26) =107372544a(27) =214745088a(28) =357908480a(29) =715816960

External references