A183575 - cp's OEIS frontend

A183575 a(n) = n - 1 + ceiling((n^2-2)/2); complement of A183574.

n	a(n)
1	0
2	2
3	6
4	10
5	16
6	22
7	30
8	38
9	48
10	58
11	70
12	82
13	96
14	110
15	126
16	142
17	160
18	178
19	198
20	218
21	240
22	262
23	286
24	310
25	336
26	362
27	390
28	418
29	448
30	478
31	510
32	542
33	576
34	610
35	646
36	682
37	720
38	758
39	798
40	838
41	880
42	922
43	966
44	1010
45	1056
46	1102
47	1150
48	1198
49	1248
50	1298
51	1350
52	1402
53	1456
54	1510
55	1566
56	1622
57	1680
58	1738
59	1798
60	1858
61	1920
62	1982
63	2046
64	2110
65	2176
66	2242
67	2310
68	2378
69	2448
70	2518

[0, 2, 6, 10, 16, 22, 30, 38, 48, 58, 70, 82, 96, 110, 126, 142, 160, 178, 198, 218, 240, 262, 286, 310, 336, 362, 390, 418, 448, 478, 510, 542, 576, 610, 646, 682, 720, 758, 798, 838, 880, 922, 966, 1010, 1056, 1102, 1150, 1198, 1248, 1298, 1350, 1402, 1456, 1510, 1566, 1622, 1680, 1738, 1798, 1858, 1920, 1982, 2046, 2110, 2176, 2242, 2310, 2378, 2448, 2518]

cp's OEIS Frontend

A183575 a(n) = n - 1 + ceiling((n^2-2)/2); complement of A183574.

Table of values

List of values