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.

A278071 Triangle read by rows, coefficients of the polynomials P(n,x) = (-1)^n*hypergeom( [n,-n], [], x), powers in descending order.

Table of values

n a(n)
0 1
1 1
2 -1
3 6
4 -4
5 1
6 60
7 -36
8 9
9 -1
10 840
11 -480
12 120
13 -16
14 1
15 15120
16 -8400
17 2100
18 -300
19 25
20 -1
21 332640
22 -181440
23 45360
24 -6720
25 630
26 -36
27 1
28 8648640
29 -4656960
30 1164240
31 -176400
32 17640
33 -1176
34 49
35 -1
36 259459200
37 -138378240
38 34594560
39 -5322240
40 554400
41 -40320
42 2016
43 -64
44 1

List of values

[1, 1, -1, 6, -4, 1, 60, -36, 9, -1, 840, -480, 120, -16, 1, 15120, -8400, 2100, -300, 25, -1, 332640, -181440, 45360, -6720, 630, -36, 1, 8648640, -4656960, 1164240, -176400, 17640, -1176, 49, -1, 259459200, -138378240, 34594560, -5322240, 554400, -40320, 2016, -64, 1]