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.

A137449 A triangular sequence based on concepts of operations on existing sequences: in this case the H(x,n) ( A060821) traditional Hermite is differentiated twice : p(x,n)=-x^2*H''(x,n)+H(x,n).

Table of values

n a(n)
1 1
2 1
3 1
4 -2
5 0
6 -4
7 0
8 -12
9 0
10 -40
11 12
12 0
13 48
14 0
15 -176
16 0
17 120
18 0
19 800
20 0
21 -608
22 -120
23 0
24 -720
25 0
26 5280
27 0
28 -1856
29 0
30 -1680
31 0
32 -16800
33 0
34 25536
35 0
36 -5248
37 1680
38 0
39 13440
40 0
41 -147840
42 0
43 103936
44 0
45 -14080
46 0
47 30240
48 0
49 403200
50 0
51 -919296
52 0
53 377856
54 0
55 -36352
56 -30240
57 0
58 -302400
59 0
60 4435200
61 0
62 -4677120
63 0

List of values

[1, 1, 1, -2, 0, -4, 0, -12, 0, -40, 12, 0, 48, 0, -176, 0, 120, 0, 800, 0, -608, -120, 0, -720, 0, 5280, 0, -1856, 0, -1680, 0, -16800, 0, 25536, 0, -5248, 1680, 0, 13440, 0, -147840, 0, 103936, 0, -14080, 0, 30240, 0, 403200, 0, -919296, 0, 377856, 0, -36352, -30240, 0, -302400, 0, 4435200, 0, -4677120, 0]