A085224 -id:A085224 - cp's OEIS frontend

A085223 Row 1 of A085201.

1, 2, 4, 6, 9, 11, 14, 16, 19, 23, 25, 28, 30, 33, 37, 39, 42, 44, 47, 51, 53, 56, 60, 65, 67, 70, 72, 75, 79, 81, 84, 86, 89, 93, 95, 98, 102, 107, 109, 112, 114, 117, 121, 123, 126, 128, 131, 135, 137, 140, 144, 149, 151, 154, 156, 159, 163, 165, 168, 172, 177, 179

Offset: 0

Antti Karttunen, Jun 23 2003

nonn

Gives in A014486 the positions of the plane general trees whose rightmost subtree (branching from the root) is just a stick: "/", thus corresponding to the parenthesizations whose last element (of the top-level list) is an empty parenthesization: (), i.e. in A063171 positions of the terms which end with digits ...10

a(n) = A085201bi(n, 1) = A057164(A072795(A057164(n))) = A057508(A072795(A057508(n))) = A080300(A085224(n))

A083937 A014486-encodings of the plane binary trees and plane general trees whose left(most) subtree is just a "stick": \.

Original entry on oeis.org

2, 10, 42, 44, 170, 172, 178, 180, 184, 682, 684, 690, 692, 696, 714, 716, 722, 724, 728, 738, 740, 744, 752, 2730, 2732, 2738, 2740, 2744, 2762, 2764, 2770, 2772, 2776, 2786, 2788, 2792, 2800, 2858, 2860, 2866, 2868, 2872, 2890, 2892, 2898, 2900, 2904, 2914

Offset: 0