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.

A339282 Triangle read by rows: T(n,k) is the number of unoriented series-parallel networks with n colored elements using exactly k colors.

Table of values

n a(n)
1 1
2 2
3 2
4 4
5 14
6 10
7 11
8 84
9 168
10 98
11 30
12 522
13 2109
14 3004
15 1396
16 98
17 3426
18 24397
19 63094
20 67660
21 25652
22 328
23 23404
24 274626
25 1142420
26 2119985
27 1805082
28 576010
29 1193
30 165417
31 3065376
32 19230320
33 54916745
34 78809079
35 55503392
36 15282038
37 4459
38 1197934
39 34201068
40 311157620
41 1283360335
42 2761083930
43 3220245007
44 1932118328
45 467747416

List of values

[1, 2, 2, 4, 14, 10, 11, 84, 168, 98, 30, 522, 2109, 3004, 1396, 98, 3426, 24397, 63094, 67660, 25652, 328, 23404, 274626, 1142420, 2119985, 1805082, 576010, 1193, 165417, 3065376, 19230320, 54916745, 78809079, 55503392, 15282038, 4459, 1197934, 34201068, 311157620, 1283360335, 2761083930, 3220245007, 1932118328, 467747416]

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

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