A171452 - cp's OEIS frontend

A171452 a(n) = C(n,2) + floor(n/3).

n	a(n)
0	0
1	0
2	1
3	4
4	7
5	11
6	17
7	23
8	30
9	39
10	48
11	58
12	70
13	82
14	95
15	110
16	125
17	141
18	159
19	177
20	196
21	217
22	238
23	260
24	284
25	308
26	333
27	360
28	387
29	415
30	445
31	475
32	506
33	539
34	572
35	606
36	642
37	678
38	715
39	754
40	793
41	833
42	875
43	917
44	960
45	1005
46	1050
47	1096
48	1144
49	1192
50	1241
51	1292
52	1343
53	1395

[0, 0, 1, 4, 7, 11, 17, 23, 30, 39, 48, 58, 70, 82, 95, 110, 125, 141, 159, 177, 196, 217, 238, 260, 284, 308, 333, 360, 387, 415, 445, 475, 506, 539, 572, 606, 642, 678, 715, 754, 793, 833, 875, 917, 960, 1005, 1050, 1096, 1144, 1192, 1241, 1292, 1343, 1395]

cp's OEIS Frontend

A171452 a(n) = C(n,2) + floor(n/3).

Table of values

List of values