OFFSET
1,1
COMMENTS
See triangle in A319411.
If we divide a(n) by 2^n, we get the average runs-resistances, which are 1, 3/2, 9/4, 11/4, 55/16, 27/8, 249/64, 515/128, 1083/256, 2247/512, 4691/1024, 2407/512, ..., or, in other words, 1, 1.500000000, 2.250000000, 2.750000000, 3.437500000, 3.375000000, 3.890625000, 4.023437500, 4.230468750, 4.388671875, 4.581054688, 4.701171875, ... How does this grow?
LINKS
Hiroaki Yamanouchi, Table of n, a(n) for n = 1..75
Claude Lenormand, Deux transformations sur les mots, Preprint, 5 pages, Nov 17 2003. Apparently unpublished. This is a scanned copy of the version that the author sent to me in 2003.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Sep 20 2018
EXTENSIONS
a(13)-a(32) from Hiroaki Yamanouchi, Sep 25 2018
STATUS
approved