A354650 - cp's OEIS frontend

A354650 G.f. A(x,y) satisfies: -y = f(-x,-A(x,y)), where f(x,y) = Sum_{n=-oo..oo} x^(n(n+1)/2) y^(n*(n-1)/2) is Ramanujan's theta function.

n	a(n)
0	1
1	1
2	0
3	3
4	3
5	1
6	0
7	9
8	27
9	30
10	15
11	3
12	0
13	22
14	147
15	340
16	390
17	246
18	83
19	12
20	0
21	51
22	630
23	2530
24	5070
25	5928
26	4284
27	1908
28	486
29	55
30	0
31	108
32	2295
33	14595
34	45450
35	83559
36	98910
37	78282
38	41580
39	14355
40	2937
41	273
42	0
43	221
44	7476
45	70737
46	319605
47	849450
48	1472261
49	1757688
50	1484451
51	891890
52	375442
53	105930
54	18109
55	1428
56	0
57	429
58	22302
59	301070
60	1886010
61	6878907
62	16386636
63	27205308
64	32683680
65	28981855
66	19081854
67	9258678
68	3231514
69	771225
70	113220
71	7752

[1, 1, 0, 3, 3, 1, 0, 9, 27, 30, 15, 3, 0, 22, 147, 340, 390, 246, 83, 12, 0, 51, 630, 2530, 5070, 5928, 4284, 1908, 486, 55, 0, 108, 2295, 14595, 45450, 83559, 98910, 78282, 41580, 14355, 2937, 273, 0, 221, 7476, 70737, 319605, 849450, 1472261, 1757688, 1484451, 891890, 375442, 105930, 18109, 1428, 0, 429, 22302, 301070, 1886010, 6878907, 16386636, 27205308, 32683680, 28981855, 19081854, 9258678, 3231514, 771225, 113220, 7752]

cp's OEIS Frontend

A354650 G.f. A(x,y) satisfies: -y = f(-x,-A(x,y)), where f(x,y) = Sum_{n=-oo..oo} x^(n(n+1)/2) y^(n*(n-1)/2) is Ramanujan's theta function.

Table of values

List of values

cp's OEIS Frontend

A354650 G.f. A(x,y) satisfies: -y = f(-x,-A(x,y)), where f(x,y) = Sum_{n=-oo..oo} x^(n*(n+1)/2) * y^(n*(n-1)/2) is Ramanujan's theta function.

Table of values

List of values

A354650 G.f. A(x,y) satisfies: -y = f(-x,-A(x,y)), where f(x,y) = Sum_{n=-oo..oo} x^(n(n+1)/2) y^(n*(n-1)/2) is Ramanujan's theta function.