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.

A121437 Matrix inverse of triangle A122177, where A122177(n,k) = C( k*(k+1)/2 + n-k + 2, n-k) for n>=k>=0.

Table of values

n a(n)
0 1
1 -3
2 1
3 6
4 -4
5 1
6 -16
7 14
8 -6
9 1
10 63
11 -62
12 33
13 -9
14 1
15 -351
16 365
17 -215
18 72
19 -13
20 1
21 2609
22 -2790
23 1731
24 -642
25 143
26 -18
27 1
28 -24636
29 26749
30 -17076
31 6696
32 -1664
33 261
34 -24
35 1
36 284631
37 -311769
38 202356
39 -81963
40 21684
41 -3831
42 444
43 -31
44 1
45 -3909926
46 4305579
47 -2822991
48 1166310
49 -320515
50 60768
51 -8012
52 713
53 -39
54 1

List of values

[1, -3, 1, 6, -4, 1, -16, 14, -6, 1, 63, -62, 33, -9, 1, -351, 365, -215, 72, -13, 1, 2609, -2790, 1731, -642, 143, -18, 1, -24636, 26749, -17076, 6696, -1664, 261, -24, 1, 284631, -311769, 202356, -81963, 21684, -3831, 444, -31, 1, -3909926, 4305579, -2822991, 1166310, -320515, 60768, -8012, 713, -39, 1]