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.

A326480 T(n, k) = 2^n * n! * [x^k] [z^n] (4*exp(x*z))/(exp(z) + 1)^2, triangle read by rows, for 0 <= k <= n. Coefficients of Euler polynomials of order 2.

Table of values

n a(n)
0 1
1 -2
2 2
3 2
4 -8
5 4
6 4
7 12
8 -24
9 8
10 -16
11 32
12 48
13 -64
14 16
15 -32
16 -160
17 160
18 160
19 -160
20 32
21 272
22 -384
23 -960
24 640
25 480
26 -384
27 64
28 544
29 3808
30 -2688
31 -4480
32 2240
33 1344
34 -896
35 128
36 -7936
37 8704
38 30464
39 -14336
40 -17920
41 7168
42 3584
43 -2048
44 256

List of values

[1, -2, 2, 2, -8, 4, 4, 12, -24, 8, -16, 32, 48, -64, 16, -32, -160, 160, 160, -160, 32, 272, -384, -960, 640, 480, -384, 64, 544, 3808, -2688, -4480, 2240, 1344, -896, 128, -7936, 8704, 30464, -14336, -17920, 7168, 3584, -2048, 256]