A083932 A014486-encoding of the Catalan mountain ranges with only even-length slopes allowed.

0, 12, 204, 240, 3276, 3312, 3852, 3888, 4032, 52428, 52464, 53004, 53040, 53184, 61644, 61680, 62220, 62256, 62400, 64524, 64560, 64704, 65280, 838860, 838896, 839436, 839472, 839616, 848076, 848112, 848652, 848688, 848832, 850956, 850992

Offset

0,2

Comments

Subset of totally balanced binary strings (A014486) with only even runs of either bit 0 or 1 occurring. See A083933.

Links

Table of n, a(n) for n=0..34.

Index entries for encodings of plane rooted trees

Formula

a(n) = A008585(A083931(n)), i.e. 3*A083931(n).

Crossrefs

Same sequence in binary: A083933, indices to A014486: A083934.

Permutation of A080316 from which this differs first time at the sixth term, with a(6)=3852, while A080316(6)=4032.

Sequence in context: A133242 A141836 A363382 * A080316 A357568 A108020

Adjacent sequences: A083929 A083930 A083931 * A083933 A083934 A083935

Keyword

nonn

Author

Antti Karttunen, May 13 2003

Status

approved