Consider Post's tag system applied to the word (100)^n; a(n) = length of the longest word in the orbit, or -1 if the orbit is unbounded.

A291795

Consider Post's tag system applied to the word (100)^n; a(n) = length of the longest word in the orbit, or -1 if the orbit is unbounded.

Terms

    a(0) =6a(1) =16a(2) =16a(3) =22a(4) =56a(5) =34a(6) =176a(7) =76a(8) =62a(9) =208a(10) =62a(11) =208a(12) =68a(13) =768a(14) =104a(15) =88a(16) =106a(17) =224a(18) =146a(19) =134a(20) =226a(21) =172a(22) =132a(23) =4432a(24) =206a(25) =232a(26) =378a(27) =206a(28) =432a(29) =380

External references