A176222 - cp's OEIS frontend

A176222 a(n) = (n^2 - 3*n + 1 + (-1)^n)/2.

n	a(n)
3	0
4	3
5	5
6	10
7	14
8	21
9	27
10	36
11	44
12	55
13	65
14	78
15	90
16	105
17	119
18	136
19	152
20	171
21	189
22	210
23	230
24	253
25	275
26	300
27	324
28	351
29	377
30	406
31	434
32	465
33	495
34	528
35	560
36	595
37	629
38	666
39	702
40	741
41	779
42	820
43	860
44	903
45	945
46	990
47	1034
48	1081
49	1127
50	1176
51	1224
52	1275
53	1325
54	1378
55	1430

[0, 3, 5, 10, 14, 21, 27, 36, 44, 55, 65, 78, 90, 105, 119, 136, 152, 171, 189, 210, 230, 253, 275, 300, 324, 351, 377, 406, 434, 465, 495, 528, 560, 595, 629, 666, 702, 741, 779, 820, 860, 903, 945, 990, 1034, 1081, 1127, 1176, 1224, 1275, 1325, 1378, 1430]

cp's OEIS Frontend

A176222 a(n) = (n^2 - 3*n + 1 + (-1)^n)/2.

Table of values

List of values