A291796 Consider Post's tag system applied to the word (100)^n; a(n) = position of the longest word in the orbit, or -1 if the orbit is unbounded.

3, 14, 9, 16, 97, 34, 1293, 400, 91, 1734, 49, 1532, 51, 18168, 271, 78, 395, 674, 265, 260, 2701, 1068, 143, 935110, 2949, 1664, 2781, 2874, 9883, 3186, 1313, 996, 109875, 406, 5949, 57480, 15941, 258, 32359, 4712, 1223, 2424, 469, 35722, 1481, 1508, 395, 662

Offset: 1

Author

N. J. A. Sloane, Sep 04 2017

Keywords

• nonn

Links

• Lars Blomberg, Table of n, a(n) for n = 1..6075
• Peter R. J. Asveld, On a Post's System of Tag. Bulletin of the EATCS 36 (1988), 96-102.

Crossrefs

Cf. A284116 and the cross-references there.

Extensions

a(33) and beyond from Lars Blomberg, Apr 19 2018