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.

A277295 G.f. A(x,y) satisfies: A( x - y*A(x,y)^2, y) = x + (1-y)*A(x,y)^2, where the coefficients T(n,k) of x^n*y^k form a triangle read by rows n>=1, for k=0..n-1.

Table of values

n a(n)
1 1
2 1
3 0
4 2
5 2
6 0
7 5
8 14
9 5
10 0
11 14
12 74
13 76
14 14
15 0
16 42
17 352
18 698
19 378
20 42
21 0
22 132
23 1588
24 5088
25 5404
26 1808
27 132
28 0
29 429
30 6946
31 32461
32 56410
33 37546
34 8484
35 429
36 0
37 1430
38 29786
39 189940
40 486550
41 535410
42 244220
43 39446
44 1430
45 0
46 4862
47 126008
48 1046190
49 3690410
50 6036632
51 4597402
52 1522466
53 182732
54 4862
55 0
56 16796
57 527900
58 5511440
59 25518020
60 57890956
61 66031704
62 36873036
63 9227504
64 846248
65 16796
66 0
67 58786
68 2195580
69 28061890
70 164565240
71 493085566
72 784844330
73 661152388
74 281873618
75 54885974
76 3926338
77 58786
78 0

List of values

[1, 1, 0, 2, 2, 0, 5, 14, 5, 0, 14, 74, 76, 14, 0, 42, 352, 698, 378, 42, 0, 132, 1588, 5088, 5404, 1808, 132, 0, 429, 6946, 32461, 56410, 37546, 8484, 429, 0, 1430, 29786, 189940, 486550, 535410, 244220, 39446, 1430, 0, 4862, 126008, 1046190, 3690410, 6036632, 4597402, 1522466, 182732, 4862, 0, 16796, 527900, 5511440, 25518020, 57890956, 66031704, 36873036, 9227504, 846248, 16796, 0, 58786, 2195580, 28061890, 164565240, 493085566, 784844330, 661152388, 281873618, 54885974, 3926338, 58786, 0]