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.

A142249 Triangle read by rows, a generalization of the Eulerian numbers based on Nielsen's generalized polylogarithm (case m = 2).

Table of values

n a(n)
1 -1
2 -1
3 1
4 -1
5 2
6 -1
7 3
8 3
9 -1
10 4
11 19
12 4
13 -1
14 5
15 80
16 65
17 5
18 -1
19 6
20 286
21 566
22 181
23 6
24 -1
25 7
26 945
27 3710
28 2905
29 455
30 7
31 -1
32 8
33 2997
34 20756
35 31781
36 12636
37 1079
38 8
39 -1
40 9
41 9294
42 105299
43 278304
44 218559
45 49754
46 2469
47 9

List of values

[-1, -1, 1, -1, 2, -1, 3, 3, -1, 4, 19, 4, -1, 5, 80, 65, 5, -1, 6, 286, 566, 181, 6, -1, 7, 945, 3710, 2905, 455, 7, -1, 8, 2997, 20756, 31781, 12636, 1079, 8, -1, 9, 9294, 105299, 278304, 218559, 49754, 2469, 9]