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.

A322081 Square array A(n,k), n >= 1, k >= 0, read by antidiagonals: A(n,k) = Sum_{d|n} (-1)^(n/d+1)*d^k.

Table of values

n a(n)
1 1
2 1
3 0
4 1
5 1
6 2
7 1
8 3
9 4
10 -1
11 1
12 7
13 10
14 1
15 2
16 1
17 15
18 28
19 11
20 6
21 0
22 1
23 31
24 82
25 55
26 26
27 4
28 2
29 1
30 63
31 244
32 239
33 126
34 30
35 8
36 -2
37 1
38 127
39 730
40 991
41 626
42 196
43 50
44 1
45 3
46 1
47 255
48 2188
49 4031
50 3126
51 1230
52 344
53 43
54 13
55 0
56 1
57 511
58 6562
59 16255
60 15626
61 7564
62 2402
63 439
64 91
65 6
66 2
67 1
68 1023
69 19684
70 65279
71 78126
72 45990
73 16808
74 3823
75 757
76 78
77 12
78 -2

List of values

[1, 1, 0, 1, 1, 2, 1, 3, 4, -1, 1, 7, 10, 1, 2, 1, 15, 28, 11, 6, 0, 1, 31, 82, 55, 26, 4, 2, 1, 63, 244, 239, 126, 30, 8, -2, 1, 127, 730, 991, 626, 196, 50, 1, 3, 1, 255, 2188, 4031, 3126, 1230, 344, 43, 13, 0, 1, 511, 6562, 16255, 15626, 7564, 2402, 439, 91, 6, 2, 1, 1023, 19684, 65279, 78126, 45990, 16808, 3823, 757, 78, 12, -2]