A192447 - cp's OEIS frontend

A192447 a(n) = n(n-1)/2 if this is even, otherwise (n(n-1)/2) + 1.

n	a(n)
1	0
2	2
3	4
4	6
5	10
6	16
7	22
8	28
9	36
10	46
11	56
12	66
13	78
14	92
15	106
16	120
17	136
18	154
19	172
20	190
21	210
22	232
23	254
24	276
25	300
26	326
27	352
28	378
29	406
30	436
31	466
32	496
33	528
34	562
35	596
36	630
37	666
38	704
39	742
40	780
41	820
42	862
43	904
44	946
45	990
46	1036
47	1082
48	1128
49	1176
50	1226
51	1276
52	1326
53	1378
54	1432

[0, 2, 4, 6, 10, 16, 22, 28, 36, 46, 56, 66, 78, 92, 106, 120, 136, 154, 172, 190, 210, 232, 254, 276, 300, 326, 352, 378, 406, 436, 466, 496, 528, 562, 596, 630, 666, 704, 742, 780, 820, 862, 904, 946, 990, 1036, 1082, 1128, 1176, 1226, 1276, 1326, 1378, 1432]

cp's OEIS Frontend

A192447 a(n) = n(n-1)/2 if this is even, otherwise (n(n-1)/2) + 1.

Table of values

List of values

cp's OEIS Frontend

A192447 a(n) = n*(n-1)/2 if this is even, otherwise (n*(n-1)/2) + 1.

Table of values

List of values

A192447 a(n) = n(n-1)/2 if this is even, otherwise (n(n-1)/2) + 1.