A209643 A014486-indices for rooted plane trees where non-leaf branching can occur only at the leftmost branch of any level, but nowhere else.

0, 1, 2, 3, 4, 6, 7, 8, 9, 14, 16, 17, 19, 20, 21, 22, 23, 37, 42, 44, 45, 51, 53, 54, 56, 57, 58, 60, 61, 62, 63, 64, 65, 107, 121, 126, 128, 129, 149, 154, 156, 157, 163, 165, 166, 168, 169, 170, 177, 179, 180, 182, 183, 184, 186, 187, 188, 189, 191, 192, 193, 194, 195, 196, 197, 329, 371, 385, 390, 392, 393, 461, 475, 480, 482

Offset: 0

Author

Antti Karttunen, Mar 24 2012

Keywords

• nonn

Comments

5 is not member of this sequence, as it encodes in A014486 a general tree:

..|

\/

which has a nonempty branch which is not the leftmost child of its parent vertex.

Links

• Antti Karttunen, Table of n, a(n) for n = 0..32767
• A. Karttunen, Corresponding trees illustrated on 1, 2, 3, 4, 6, 7, 8, 9, 14, 16, 17th, etc. row in this illustration.

Crossrefs

Cf. A209644, A071163.

Formula

a(n) = A080300(A209641(n)).