A354649 - cp's OEIS frontend

A354649 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

A354649 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

A354649 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

A354649 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.