OFFSET
1,2
COMMENTS
Deleting all 1's and decrementing the remaining terms by one gives the sequence back.
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..8191
T. Kubo and R. Vakil, On Conway's recursive sequence, Discr. Math. 152 (1996), 225-252.
EXAMPLE
Illustration how the sequence can be constructed by concatenating the reversed reduced frequency counts R_n of each successive level n of A004001-tree:
1
/ \
2 1
/|\ \
____________3 2 1 1
/ / / | |\ \ \
________4 __3 2 1 2 1 1 1
/ / / / / / /| /| | |\ \ \ \
5 4 3 2 1 3 2 1 2 1 1 2 1 1 1 1
etc.
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Antti Karttunen, Jan 22 2016
STATUS
approved