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.

A244489 Triangle read by rows: T(n,k) = Sum_{j=k..n} binomial(n,j)*Stirling_2(j,k)*Bell(n-j), where Bell(n) = A000110(n), for n >= 1, 0 <= k <= n-1.

Table of values

n a(n)
1 1
2 2
3 3
4 5
5 10
6 6
7 15
8 37
9 31
10 10
11 52
12 151
13 160
14 75
15 15
16 203
17 674
18 856
19 520
20 155
21 21
22 877
23 3263
24 4802
25 3556
26 1400
27 287
28 28
29 4140
30 17007
31 28337
32 24626
33 11991
34 3290
35 490
36 36
37 21147
38 94828
39 175896
40 174805
41 101031
42 34671
43 6972
44 786
45 45
46 115975
47 562595
48 1146931
49 1279240
50 853315
51 350889
52 88977
53 13620
54 1200
55 55

List of values

[1, 2, 3, 5, 10, 6, 15, 37, 31, 10, 52, 151, 160, 75, 15, 203, 674, 856, 520, 155, 21, 877, 3263, 4802, 3556, 1400, 287, 28, 4140, 17007, 28337, 24626, 11991, 3290, 490, 36, 21147, 94828, 175896, 174805, 101031, 34671, 6972, 786, 45, 115975, 562595, 1146931, 1279240, 853315, 350889, 88977, 13620, 1200, 55]