Shifts left 2 places under the "BIK" (reversible, indistinct, unlabeled) transform with a(1) = a(2) = 1.

A032131

Shifts left 2 places under the "BIK" (reversible, indistinct, unlabeled) transform with a(1) = a(2) = 1.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =7a(6) =13a(7) =31a(8) =66a(9) =160a(10) =369a(11) =907a(12) =2191a(13) =5461a(14) =13558a(15) =34209a(16) =86426a(17) =220359a(18) =563475a(19) =1449282a(20) =3739365a(21) =9688104a(22) =25173917a(23) =65621067a(24) =171498288a(25) =449361649a(26) =1180078602a(27) =3105740797a(28) =8189749105a(29) =21636207962

External references