Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #10 Jan 30 2024 08:23:22
%S 0,12,204,240,3276,3312,3852,3888,4032,52428,52464,53004,53040,53184,
%T 61644,61680,62220,62256,62400,64524,64560,64704,65280,838860,838896,
%U 839436,839472,839616,848076,848112,848652,848688,848832,850956,850992
%N A014486-encoding of the Catalan mountain ranges with only even-length slopes allowed.
%C Subset of totally balanced binary strings (A014486) with only even runs of either bit 0 or 1 occurring. See A083933.
%H <a href="/index/Ro#RootedTreePlanEncodings">Index entries for encodings of plane rooted trees</a>
%F a(n) = A008585(A083931(n)), i.e. 3*A083931(n).
%Y Same sequence in binary: A083933, indices to A014486: A083934.
%Y Permutation of A080316 from which this differs first time at the sixth term, with a(6)=3852, while A080316(6)=4032.
%K nonn
%O 0,2
%A _Antti Karttunen_, May 13 2003