A291820 - cp's OEIS frontend

A291820 G.f. A(x,y) satisfies: A( x - xyA(x,y), y) = x + x(1-y)A(x,y), where the coefficients T(n,k) of x^n*y^k form a triangle read by rows n>=1, for k=0..n-1.

n	a(n)
1	1
2	1
3	0
4	1
5	2
6	0
7	1
8	7
9	5
10	0
11	1
12	16
13	38
14	14
15	0
16	1
17	30
18	157
19	189
20	42
21	0
22	1
23	50
24	477
25	1245
26	904
27	132
28	0
29	1
30	77
31	1197
32	5616
33	8791
34	4242
35	429
36	0
37	1
38	112
39	2632
40	19881
41	55566
42	57854
43	19723
44	1430
45	0
46	1
47	156
48	5250
49	59327
50	265204
51	491947
52	363880
53	91366
54	4862
55	0
56	1
57	210
58	9714
59	155783
60	1035442
61	3062271
62	4039551
63	2220933
64	423124
65	16796
66	0
67	1
68	275
69	16929
70	370205
71	3472513
72	15217674
73	31979723
74	31463341
75	13285415
76	1963169
77	58786
78	0
79	1
80	352
81	28094
82	811877
83	10331673
84	63678254
85	197983540
86	310618856
87	235959185
88	78419541
89	9138416
90	208012
91	0

[1, 1, 0, 1, 2, 0, 1, 7, 5, 0, 1, 16, 38, 14, 0, 1, 30, 157, 189, 42, 0, 1, 50, 477, 1245, 904, 132, 0, 1, 77, 1197, 5616, 8791, 4242, 429, 0, 1, 112, 2632, 19881, 55566, 57854, 19723, 1430, 0, 1, 156, 5250, 59327, 265204, 491947, 363880, 91366, 4862, 0, 1, 210, 9714, 155783, 1035442, 3062271, 4039551, 2220933, 423124, 16796, 0, 1, 275, 16929, 370205, 3472513, 15217674, 31979723, 31463341, 13285415, 1963169, 58786, 0, 1, 352, 28094, 811877, 10331673, 63678254, 197983540, 310618856, 235959185, 78419541, 9138416, 208012, 0]

cp's OEIS Frontend

A291820 G.f. A(x,y) satisfies: A( x - xyA(x,y), y) = x + x(1-y)A(x,y), 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

List of values

cp's OEIS Frontend

A291820 G.f. A(x,y) satisfies: A( x - x*y*A(x,y), y) = x + x*(1-y)*A(x,y), 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

List of values

A291820 G.f. A(x,y) satisfies: A( x - xyA(x,y), y) = x + x(1-y)A(x,y), where the coefficients T(n,k) of x^n*y^k form a triangle read by rows n>=1, for k=0..n-1.