A289870 - cp's OEIS frontend

A289870 a(n) = n(n + 1) for n odd, otherwise a(n) = (n - 1)(n + 1).

n	a(n)
0	-1
1	2
2	3
3	12
4	15
5	30
6	35
7	56
8	63
9	90
10	99
11	132
12	143
13	182
14	195
15	240
16	255
17	306
18	323
19	380
20	399
21	462
22	483
23	552
24	575
25	650
26	675
27	756
28	783
29	870
30	899
31	992
32	1023
33	1122
34	1155
35	1260
36	1295
37	1406
38	1443
39	1560
40	1599
41	1722
42	1763
43	1892
44	1935
45	2070
46	2115
47	2256
48	2303
49	2450
50	2499

[-1, 2, 3, 12, 15, 30, 35, 56, 63, 90, 99, 132, 143, 182, 195, 240, 255, 306, 323, 380, 399, 462, 483, 552, 575, 650, 675, 756, 783, 870, 899, 992, 1023, 1122, 1155, 1260, 1295, 1406, 1443, 1560, 1599, 1722, 1763, 1892, 1935, 2070, 2115, 2256, 2303, 2450, 2499]

cp's OEIS Frontend

A289870 a(n) = n(n + 1) for n odd, otherwise a(n) = (n - 1)(n + 1).

Table of values

List of values

cp's OEIS Frontend

A289870 a(n) = n*(n + 1) for n odd, otherwise a(n) = (n - 1)*(n + 1).

Table of values

List of values

A289870 a(n) = n(n + 1) for n odd, otherwise a(n) = (n - 1)(n + 1).