OFFSET
1,2
COMMENTS
From the second term 3 onward also one more than the partial sums of A076050.
LINKS
Paolo Xausa, Table of n, a(n) for n = 1..16796
Antti Karttunen, Notes concerning A080237-tree and related sequences.
FORMULA
MATHEMATICA
PositionIndex[Nest[Flatten[Map[Range[#+1] &, #]] &, {1}, 6]][[1]] (* Paolo Xausa, Mar 04 2024 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jun 14 2003. Proposed by Wouter Meeussen Mar 15 2003.
STATUS
approved