A179207 - cp's OEIS frontend

A179207 a(n) = n - 1 + ceiling((-3 + n^2)/2) if n > 1 with a(1)=1, complement of A182835.

n	a(n)
1	1
2	2
3	5
4	10
5	15
6	22
7	29
8	38
9	47
10	58
11	69
12	82
13	95
14	110
15	125
16	142
17	159
18	178
19	197
20	218
21	239
22	262
23	285
24	310
25	335
26	362
27	389
28	418
29	447
30	478
31	509
32	542
33	575
34	610
35	645
36	682
37	719
38	758
39	797
40	838
41	879
42	922
43	965
44	1010
45	1055
46	1102
47	1149
48	1198
49	1247
50	1298
51	1349
52	1402
53	1455

[1, 2, 5, 10, 15, 22, 29, 38, 47, 58, 69, 82, 95, 110, 125, 142, 159, 178, 197, 218, 239, 262, 285, 310, 335, 362, 389, 418, 447, 478, 509, 542, 575, 610, 645, 682, 719, 758, 797, 838, 879, 922, 965, 1010, 1055, 1102, 1149, 1198, 1247, 1298, 1349, 1402, 1455]

cp's OEIS Frontend

A179207 a(n) = n - 1 + ceiling((-3 + n^2)/2) if n > 1 with a(1)=1, complement of A182835.

Table of values

List of values