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.

A365674 Triangle read by rows. T(n, k) = ((n - k + 1)*(n - k + 2)/2) * T(n, k - 1) + T(n - 1, k) for 0 < k < n, T(n, 0) = 1 and T(n, n) = T(n, n - 1) for n > 0.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 4
5 4
6 1
7 10
8 34
9 34
10 1
11 20
12 154
13 496
14 496
15 1
16 35
17 504
18 3520
19 11056
20 11056
21 1
22 56
23 1344
24 16960
25 112816
26 349504
27 349504
28 1
29 84
30 3108
31 63580
32 748616
33 4841200
34 14873104
35 14873104
36 1
37 120
38 6468
39 199408
40 3739736
41 42238560
42 268304464
43 819786496
44 819786496

List of values

[1, 1, 1, 1, 4, 4, 1, 10, 34, 34, 1, 20, 154, 496, 496, 1, 35, 504, 3520, 11056, 11056, 1, 56, 1344, 16960, 112816, 349504, 349504, 1, 84, 3108, 63580, 748616, 4841200, 14873104, 14873104, 1, 120, 6468, 199408, 3739736, 42238560, 268304464, 819786496, 819786496]