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.

A381932 Triangular array T(n, k) read by rows: denominators of the coefficients for the iterated exponential F^{r}(x) = x + Sum_{n>=1} x^(n+1)*Sum_{k=1..n} r^(n+1-k)*T(n, k)/A381931(n, k) with F^{1}(x) = exp(x)-1 and F^{2}(x) = exp(exp(x)-1)-1.

Table of values

n a(n)
1 1
2 1
3 -1
4 1
5 -5
6 1
7 1
8 -13
9 1
10 -1
11 1
12 -77
13 89
14 -91
15 11
16 1
17 -29
18 175
19 -149
20 91
21 -1
22 1
23 -223
24 1501
25 -37
26 391
27 -43
28 -11
29 1
30 -481
31 2821
32 -13943
33 725
34 -2357
35 17
36 29
37 1
38 -4609
39 16099
40 -19481
41 91313
42 -55649
43 23137
44 1727
45 493
46 1
47 -4861
48 89993
49 -933293
50 399637
51 -1061231
52 2035739
53 -8189
54 4897
55 -2711

List of values

[1, 1, -1, 1, -5, 1, 1, -13, 1, -1, 1, -77, 89, -91, 11, 1, -29, 175, -149, 91, -1, 1, -223, 1501, -37, 391, -43, -11, 1, -481, 2821, -13943, 725, -2357, 17, 29, 1, -4609, 16099, -19481, 91313, -55649, 23137, 1727, 493, 1, -4861, 89993, -933293, 399637, -1061231, 2035739, -8189, 4897, -2711]