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.

A308322 A(n,k) = Sum_{i_1=0..n} Sum_{i_2=0..n} ... Sum_{i_k=0..n} (-1)^(i_1 + i_2 + ... + i_k) * multinomial(i_1 + i_2 + ... + i_k; i_1, i_2, ..., i_k), square array A(n,k) read by antidiagonals, for n >= 0, k >= 0.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 0
5 1
6 1
7 1
8 1
9 1
10 1
11 -2
12 3
13 0
14 1
15 1
16 9
17 37
18 9
19 1
20 1
21 1
22 -44
23 997
24 -692
25 31
26 0
27 1
28 1
29 265
30 44121
31 148041
32 14371
33 111
34 1
35 1
36 1
37 -1854
38 2882071
39 -66211704
40 25413205
41 -315002
42 407
43 0
44 1
45 1
46 14833
47 260415373
48 53414037505
49 120965241901
50 4744544613
51 7156969
52 1513
53 1
54 1

List of values

[1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, -2, 3, 0, 1, 1, 9, 37, 9, 1, 1, 1, -44, 997, -692, 31, 0, 1, 1, 265, 44121, 148041, 14371, 111, 1, 1, 1, -1854, 2882071, -66211704, 25413205, -315002, 407, 0, 1, 1, 14833, 260415373, 53414037505, 120965241901, 4744544613, 7156969, 1513, 1, 1]