A209455 - cp's OEIS frontend

A209455 a(n) = Pell(n)*A002652(n) for n>=1, with a(0)=1, where A002652 lists the coefficients in theta series of Kleinian lattice Z[(-1+sqrt(-7))/2].

n	a(n)
0	1
1	2
2	8
3	0
4	72
5	0
6	0
7	338
8	3264
9	1970
10	0
11	22964
12	0
13	0
14	323128
15	0
16	4708320
17	0
18	10976840
19	0
20	0
21	0
22	745778864
23	900234724
24	0
25	2623476242
26	0
27	0
28	110745336312
29	178241928596
30	0
31	0
32	7524162792576
33	0
34	0
35	0
36	127800022137480
37	205691031143924
38	0
39	0
40	0
41	0
42	0
43	40725785296405556

[1, 2, 8, 0, 72, 0, 0, 338, 3264, 1970, 0, 22964, 0, 0, 323128, 0, 4708320, 0, 10976840, 0, 0, 0, 745778864, 900234724, 0, 2623476242, 0, 0, 110745336312, 178241928596, 0, 0, 7524162792576, 0, 0, 0, 127800022137480, 205691031143924, 0, 0, 0, 0, 0, 40725785296405556]

cp's OEIS Frontend

A209455 a(n) = Pell(n)*A002652(n) for n>=1, with a(0)=1, where A002652 lists the coefficients in theta series of Kleinian lattice Z[(-1+sqrt(-7))/2].

Table of values

List of values