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.

A301480 Number of rooted twice-partitions of n.

Table of values

n a(n)
1 1
2 1
3 2
4 4
5 8
6 15
7 30
8 54
9 103
10 186
11 345
12 606
13 1115
14 1936
15 3466
16 6046
17 10630
18 18257
19 31927
20 54393
21 93894
22 159631
23 272155
24 458891
25 779375
26 1305801
27 2196009
28 3667242
29 6130066
30 10170745
31 16923127
32 27942148
33 46211977
34 76039205
35 125094369
36 204952168
37 335924597

List of values

[1, 1, 2, 4, 8, 15, 30, 54, 103, 186, 345, 606, 1115, 1936, 3466, 6046, 10630, 18257, 31927, 54393, 93894, 159631, 272155, 458891, 779375, 1305801, 2196009, 3667242, 6130066, 10170745, 16923127, 27942148, 46211977, 76039205, 125094369, 204952168, 335924597]

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

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