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.

A301930 G.f. A(x,y) satisfies: A(x,y) = x * (1 + y*A(x,y)*A'(x,y)) / (1 + A(x,y)*A'(x,y)), where A'(x,y) = d/dx A(x,y).

Table of values

n a(n)
1 1
2 -1
3 1
4 4
5 -7
6 3
7 -25
8 63
9 -52
10 14
11 200
12 -661
13 808
14 -432
15 85
16 -1890
17 7754
18 -12586
19 10090
20 -3989
21 621
22 20248
23 -99450
24 201726
25 -216125
26 128869
27 -40504
28 5236
29 -240069
30 1375831
31 -3354625
32 4508559
33 -3604985
34 1713731
35 -448122
36 49680
37 3102000
38 -20349633
39 58049510
40 -94012374
41 94504280
42 -60352776
43 23900178
44 -5362906
45 521721
46 -43226590
47 319817454
48 -1046234664
49 1985688420
50 -2408884136
51 1936407600
52 -1031098592
53 350561508
54 -69025155
55 5994155

List of values

[1, -1, 1, 4, -7, 3, -25, 63, -52, 14, 200, -661, 808, -432, 85, -1890, 7754, -12586, 10090, -3989, 621, 20248, -99450, 201726, -216125, 128869, -40504, 5236, -240069, 1375831, -3354625, 4508559, -3604985, 1713731, -448122, 49680, 3102000, -20349633, 58049510, -94012374, 94504280, -60352776, 23900178, -5362906, 521721, -43226590, 319817454, -1046234664, 1985688420, -2408884136, 1936407600, -1031098592, 350561508, -69025155, 5994155]