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.

A370380 Array read by downward antidiagonals: A(n,k) = (k+2)*A(n-1,k+1) + Sum_{j=0..k} A(n-1,j) with A(0,k) = 1, n >= 0, k >= 0.

Table of values

n a(n)
0 1
1 1
2 3
3 1
4 5
5 13
6 1
7 7
8 29
9 71
10 1
11 9
12 51
13 195
14 461
15 1
16 11
17 79
18 409
19 1493
20 3447
21 1
22 13
23 113
24 737
25 3623
26 12823
27 29093
28 1
29 15
30 153
31 1203
32 7427
33 35285
34 122125
35 273343
36 1
37 17
38 199
39 1831
40 13601
41 81009
42 375591
43 1277991
44 2829325
45 1
46 19
47 251
48 2645
49 22961
50 164371
51 954419
52 4344485
53 14584789
54 31998903

List of values

[1, 1, 3, 1, 5, 13, 1, 7, 29, 71, 1, 9, 51, 195, 461, 1, 11, 79, 409, 1493, 3447, 1, 13, 113, 737, 3623, 12823, 29093, 1, 15, 153, 1203, 7427, 35285, 122125, 273343, 1, 17, 199, 1831, 13601, 81009, 375591, 1277991, 2829325, 1, 19, 251, 2645, 22961, 164371, 954419, 4344485, 14584789, 31998903]