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.

A154231 Triangle T(n, k) = T(n-1, k) + T(n-1, k-1) + ((n+1)^2*(n+2)^2*(2*n^2 +6*n +3)/12)*T(n-2, k-1), read by rows.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 278
5 1
6 1
7 1579
8 1579
9 1
10 1
11 6005
12 1233308
13 6005
14 1
15 1
16 18207
17 20504692
18 20504692
19 18207
20 1
21 1
22 47216
23 194715939
24 35816807848
25 194715939
26 47216
27 1
28 1
29 108993
30 1319518787
31 1302709376779
32 1302709376779
33 1319518787
34 108993
35 1
36 1
37 229819
38 7024500980
39 24830582225241
40 4330171226988158
41 24830582225241
42 7024500980
43 229819
44 1

List of values

[1, 1, 1, 1, 278, 1, 1, 1579, 1579, 1, 1, 6005, 1233308, 6005, 1, 1, 18207, 20504692, 20504692, 18207, 1, 1, 47216, 194715939, 35816807848, 194715939, 47216, 1, 1, 108993, 1319518787, 1302709376779, 1302709376779, 1319518787, 108993, 1, 1, 229819, 7024500980, 24830582225241, 4330171226988158, 24830582225241, 7024500980, 229819, 1]