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A081292 Intersection of A014486 and A079946. 2
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 (list; graph; refs; listen; history; text; internal format)
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.

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

FORMULA

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

CROSSREFS

Sequence in context: A318404 A041274 A029586 * A052022 A110907 A009937

Adjacent sequences:  A081289 A081290 A081291 * A081293 A081294 A081295

KEYWORD

nonn

AUTHOR

Antti Karttunen Mar 17 2003

STATUS

approved

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Last modified January 28 10:02 EST 2020. Contains 331319 sequences. (Running on oeis4.)