A081292 Intersection of A014486 and A079946.

0, 12, 50, 52, 56, 202, 204, 210, 212, 216, 226, 228, 232, 240, 810, 812, 818, 820, 824, 842, 844, 850, 852, 856, 866, 868, 872, 880, 906, 908, 914, 916, 920, 930, 932, 936, 944, 962, 964, 968, 976, 992, 3242, 3244, 3250, 3252, 3256, 3274, 3276, 3282, 3284

Offset

1,2

Comments

These are A014486-encodings of the binary trees (or equivalent general trees) whose left subtree (equivalently: leftmost branch) is not just a single edge.

Links

Table of n, a(n) for n=1..51.

Antti Karttunen, Initial terms illustrated in positions 0,3,6,7,8,14,15,16,17,18,...

Formula

a(n) = A014486(A081291(n)).

Crossrefs

Cf. A014486, A079946.

Sequence in context: A041274 A029586 A335698 * A052022 A110907 A009937

Adjacent sequences: A081289 A081290 A081291 * A081293 A081294 A081295

Keyword

nonn

Author

Antti Karttunen, Mar 17 2003

Status

approved