A289296 - cp's OEIS frontend

A289296 a(n) = (n - 1)(2floor(n/2) + 1).

n	a(n)
0	-1
1	0
2	3
3	6
4	15
5	20
6	35
7	42
8	63
9	72
10	99
11	110
12	143
13	156
14	195
15	210
16	255
17	272
18	323
19	342
20	399
21	420
22	483
23	506
24	575
25	600
26	675
27	702
28	783
29	812
30	899
31	930
32	1023
33	1056
34	1155
35	1190
36	1295
37	1332
38	1443
39	1482
40	1599
41	1640
42	1763
43	1806
44	1935
45	1980
46	2115
47	2162
48	2303
49	2352
50	2499
51	2550
52	2703
53	2756
54	2915

[-1, 0, 3, 6, 15, 20, 35, 42, 63, 72, 99, 110, 143, 156, 195, 210, 255, 272, 323, 342, 399, 420, 483, 506, 575, 600, 675, 702, 783, 812, 899, 930, 1023, 1056, 1155, 1190, 1295, 1332, 1443, 1482, 1599, 1640, 1763, 1806, 1935, 1980, 2115, 2162, 2303, 2352, 2499, 2550, 2703, 2756, 2915]

cp's OEIS Frontend

A289296 a(n) = (n - 1)(2floor(n/2) + 1).

Table of values

List of values

cp's OEIS Frontend

A289296 a(n) = (n - 1)*(2*floor(n/2) + 1).

Table of values

List of values

A289296 a(n) = (n - 1)(2floor(n/2) + 1).