A215098 - cp's OEIS frontend

A215098 a(0)=0, a(1)=1, a(n) = n*(n-1) - a(n-2).

n	a(n)
0	0
1	1
2	2
3	5
4	10
5	15
6	20
7	27
8	36
9	45
10	54
11	65
12	78
13	91
14	104
15	119
16	136
17	153
18	170
19	189
20	210
21	231
22	252
23	275
24	300
25	325
26	350
27	377
28	406
29	435
30	464
31	495
32	528
33	561
34	594
35	629
36	666
37	703
38	740
39	779
40	820
41	861
42	902
43	945
44	990
45	1035
46	1080
47	1127
48	1176
49	1225
50	1274
51	1325
52	1378
53	1431

[0, 1, 2, 5, 10, 15, 20, 27, 36, 45, 54, 65, 78, 91, 104, 119, 136, 153, 170, 189, 210, 231, 252, 275, 300, 325, 350, 377, 406, 435, 464, 495, 528, 561, 594, 629, 666, 703, 740, 779, 820, 861, 902, 945, 990, 1035, 1080, 1127, 1176, 1225, 1274, 1325, 1378, 1431]

cp's OEIS Frontend

A215098 a(0)=0, a(1)=1, a(n) = n*(n-1) - a(n-2).

Table of values

List of values