A225948 - cp's OEIS frontend

A225948 a(0) = -1; for n>0, a(n) = numerator(1/4 - 4/n^2).

n	a(n)
0	-1
1	-15
2	-3
3	-7
4	0
5	9
6	5
7	33
8	3
9	65
10	21
11	105
12	2
13	153
14	45
15	209
16	15
17	273
18	77
19	345
20	6
21	425
22	117
23	513
24	35
25	609
26	165
27	713
28	12
29	825
30	221
31	945
32	63
33	1073
34	285
35	1209
36	20
37	1353
38	357
39	1505
40	99
41	1665
42	437
43	1833
44	30
45	2009
46	525
47	2193
48	143

[-1, -15, -3, -7, 0, 9, 5, 33, 3, 65, 21, 105, 2, 153, 45, 209, 15, 273, 77, 345, 6, 425, 117, 513, 35, 609, 165, 713, 12, 825, 221, 945, 63, 1073, 285, 1209, 20, 1353, 357, 1505, 99, 1665, 437, 1833, 30, 2009, 525, 2193, 143]

cp's OEIS Frontend

A225948 a(0) = -1; for n>0, a(n) = numerator(1/4 - 4/n^2).

Table of values

List of values