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.

A144702 Numerators of triangle S(n,k), n>=0, 0<=k<=ceiling((3n+1)/2): S(n,k) is the coefficient of x^k in polynomial s_n(x), used to define continuous and n times differentiable sigmoidal transfer functions.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 -1
5 1
6 1
7 0
8 -1
9 1
10 1
11 5
12 0
13 -5
14 5
15 -3
16 1
17 21
18 0
19 -35
20 0
21 63
22 -7
23 15
24 1
25 3
26 0
27 -7
28 0
29 21
30 -14
31 15
32 -3
33 1
34 25
35 0
36 -15
37 0
38 63
39 0
40 -75
41 45
42 -175
43 2
44 1
45 55
46 0
47 -165
48 0
49 231
50 0
51 -825
52 165
53 -1925
54 22
55 -105
56 1
57 455
58 0
59 -715
60 0
61 3861
62 0
63 -2145
64 0
65 25025
66 -143
67 12285
68 -65

List of values

[1, 1, 1, 1, -1, 1, 1, 0, -1, 1, 1, 5, 0, -5, 5, -3, 1, 21, 0, -35, 0, 63, -7, 15, 1, 3, 0, -7, 0, 21, -14, 15, -3, 1, 25, 0, -15, 0, 63, 0, -75, 45, -175, 2, 1, 55, 0, -165, 0, 231, 0, -825, 165, -1925, 22, -105, 1, 455, 0, -715, 0, 3861, 0, -2145, 0, 25025, -143, 12285, -65]