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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A218782 A014486-codes for the compact representation of Beanstalk-tree, growing by two natural numbers at time, starting from the tree of one internal node (1) and two leaves (3 and 2), with the larger numbers coming to the left hand side.

Table of values

n a(n)
1 2
2 12
3 52
4 216
5 872
6 3496
7 14024
8 56200
9 224904
10 899720
11 3599496
12 14398600
13 57599112
14 230398088
15 921606280
16 3686471816
17 14745933960
18 58983782536
19 235935438984
20 943742064776
21 3774970665096
22 15099883493512
23 60399541098632
24 241598171519112
25 966392760309896

List of values

[2, 12, 52, 216, 872, 3496, 14024, 56200, 224904, 899720, 3599496, 14398600, 57599112, 230398088, 921606280, 3686471816, 14745933960, 58983782536, 235935438984, 943742064776, 3774970665096, 15099883493512, 60399541098632, 241598171519112, 966392760309896]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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