cp's OEIS Frontend

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.

A245123 Number of n-node rooted identity trees with thinning limbs and root outdegree (branching factor) 4.

Table of values

n a(n)
11 2
12 3
13 9
14 20
15 46
16 94
17 202
18 412
19 850
20 1719
21 3483
22 6987
23 14026
24 27990
25 55830
26 111022
27 220589
28 437451
29 866898
30 1715821
31 3393973
32 6708016
33 13251455
34 26163174
35 51635765
36 101868226
37 200908954
38 396129137
39 780868821
40 1538971204
41 3032575428
42 5974874666
43 11770477038

List of values

[2, 3, 9, 20, 46, 94, 202, 412, 850, 1719, 3483, 6987, 14026, 27990, 55830, 111022, 220589, 437451, 866898, 1715821, 3393973, 6708016, 13251455, 26163174, 51635765, 101868226, 200908954, 396129137, 780868821, 1538971204, 3032575428, 5974874666, 11770477038]

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

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