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.

A269943 Triangle read by rows, T(n,k) = ((-1)^k*(2*n)!/4^k)*P[n,k](1/((2*n-1)*(2*n))) where P is the inverse P-transform, for n>=0 and 0<=k<=n.

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 2
5 6
6 0
7 16
8 60
9 90
10 0
11 288
12 1176
13 2520
14 2520
15 0
16 9216
17 39360
18 98280
19 151200
20 113400
21 0
22 460800
23 2023296
24 5504400
25 10311840
26 12474000
27 7484400
28 0
29 33177600
30 148442112
31 426666240
32 896575680
33 1362160800
34 1362160800
35 681080400

List of values

[1, 0, 1, 0, 2, 6, 0, 16, 60, 90, 0, 288, 1176, 2520, 2520, 0, 9216, 39360, 98280, 151200, 113400, 0, 460800, 2023296, 5504400, 10311840, 12474000, 7484400, 0, 33177600, 148442112, 426666240, 896575680, 1362160800, 1362160800, 681080400]