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.

A137514 A triangular sequence from umbral calculus expansion of Simon Plouffe's rational polynomial for A002890: p(x,t) = exp(x*t)*(1 - 6*t + 9*t^2 - 4*t^3 + t^4)/(4*t - 1)/(2*t - 1).

Table of values

n a(n)
1 1
2 0
3 1
4 2
5 0
6 1
7 12
8 6
9 0
10 1
11 120
12 48
13 12
14 0
15 1
16 1680
17 600
18 120
19 20
20 0
21 1
22 31680
23 10080
24 1800
25 240
26 30
27 0
28 1
29 766080
30 221760
31 35280
32 4200
33 420
34 42
35 0
36 1
37 22579200
38 6128640
39 887040
40 94080
41 8400
42 672
43 56
44 0
45 1
46 778014720
47 203212800
48 27578880
49 2661120
50 211680
51 15120
52 1008
53 72
54 0
55 1

List of values

[1, 0, 1, 2, 0, 1, 12, 6, 0, 1, 120, 48, 12, 0, 1, 1680, 600, 120, 20, 0, 1, 31680, 10080, 1800, 240, 30, 0, 1, 766080, 221760, 35280, 4200, 420, 42, 0, 1, 22579200, 6128640, 887040, 94080, 8400, 672, 56, 0, 1, 778014720, 203212800, 27578880, 2661120, 211680, 15120, 1008, 72, 0, 1]