login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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: A219153 A041274 A029586 * A052022 A110907 A009937

Adjacent sequences:  A081289 A081290 A081291 * A081293 A081294 A081295

KEYWORD

nonn

AUTHOR

Antti Karttunen Mar 17 2003

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified November 18 00:38 EST 2017. Contains 294837 sequences.