Preperiod (or threshold) of orbit of Post's {00, 1101} tag system applied to the word (100)^n, or -1 if this word has an unbounded trajectory.

A284119

Preperiod (or threshold) of orbit of Post's {00, 1101} tag system applied to the word (100)^n, or -1 if this word has an unbounded trajectory.

Terms

    a(0) =4a(1) =15a(2) =10a(3) =25a(4) =411a(5) =47a(6) =2128a(7) =853a(8) =372a(9) =2805a(10) =366a(11) =2603a(12) =703a(13) =37912a(14) =612a(15) =127a(16) =998a(17) =2401a(18) =1200a(19) =623a(20) =5280a(21) =1778a(22) =1462a(23) =4346269a(24) =4129a(25) =3241a(26) =7018a(27) =3885a(28) =14632a(29) =7019

External references