Consider the Watanabe tag system defined in A291067; a(n) = number of binary words of length n which terminate in a cycle.

A291781

Consider the Watanabe tag system defined in A291067; a(n) = number of binary words of length n which terminate in a cycle.

Terms

    a(0) =0a(1) =0a(2) =4a(3) =12a(4) =16a(5) =32a(6) =64a(7) =128a(8) =384a(9) =704a(10) =896a(11) =2304a(12) =4608a(13) =7680a(14) =16384a(15) =36864a(16) =65536a(17) =143360a(18) =303104a(19) =565248a(20) =1245184a(21) =2473984a(22) =4521984a(23) =9961472a(24) =19070976a(25) =35389440a(26) =78643200a(27) =154664960a(28) =289931264a(29) =635437056

External references