A209449 - cp's OEIS frontend

A209449 a(n) = Pell(n)*A113973(n) for n>=1, with a(0)=1, where A113973 lists the coefficients in phi(x^3)^3/phi(x) and phi() is a Ramanujan theta function.

n	a(n)
0	1
1	-2
2	8
3	-10
4	24
5	0
6	280
7	-676
8	1632
9	-1970
10	0
11	0
12	27720
13	-133844
14	646256
15	0
16	941664
17	0
18	10976840
19	-26500436
20	0
21	-154455860
22	0
23	0
24	2173358880
25	-2623476242
26	25334527696
27	-15290740090
28	73830224208
29	0
30	0
31	-1038870091396
32	2508054264192
33	0
34	0
35	0
36	42600007379160

[1, -2, 8, -10, 24, 0, 280, -676, 1632, -1970, 0, 0, 27720, -133844, 646256, 0, 941664, 0, 10976840, -26500436, 0, -154455860, 0, 0, 2173358880, -2623476242, 25334527696, -15290740090, 73830224208, 0, 0, -1038870091396, 2508054264192, 0, 0, 0, 42600007379160]

cp's OEIS Frontend

A209449 a(n) = Pell(n)*A113973(n) for n>=1, with a(0)=1, where A113973 lists the coefficients in phi(x^3)^3/phi(x) and phi() is a Ramanujan theta function.

Table of values

List of values