A057057 - cp's OEIS frontend

A057057 Let R(i,j) be the rectangle with antidiagonals 1; 2,3; 4,5,6; ...; C(n,3) is in antidiagonal a(n).

n	a(n)
3	1
4	3
5	4
6	6
7	8
8	11
9	13
10	15
11	18
12	21
13	24
14	27
15	30
16	33
17	37
18	40
19	44
20	48
21	52
22	55
23	60
24	64
25	68
26	72
27	76
28	81
29	85
30	90
31	95
32	100
33	104
34	109
35	114
36	119
37	125
38	130
39	135
40	141
41	146
42	152
43	157
44	163
45	168
46	174
47	180
48	186
49	192
50	198
51	204
52	210
53	216
54	223
55	229

[1, 3, 4, 6, 8, 11, 13, 15, 18, 21, 24, 27, 30, 33, 37, 40, 44, 48, 52, 55, 60, 64, 68, 72, 76, 81, 85, 90, 95, 100, 104, 109, 114, 119, 125, 130, 135, 141, 146, 152, 157, 163, 168, 174, 180, 186, 192, 198, 204, 210, 216, 223, 229]

cp's OEIS Frontend

A057057 Let R(i,j) be the rectangle with antidiagonals 1; 2,3; 4,5,6; ...; C(n,3) is in antidiagonal a(n).

Table of values

List of values

n	a(n)
3	1
4	3
5	4
6	6
7	8
8	11
9	13
10	15
11	18
12	21
13	24
14	27
15	30
16	33
17	37
18	40
19	44
20	48
21	52
22	55
23	60
24	64
25	68
26	72
27	76
28	81
29	85
30	90
31	95
32	100
33	104
34	109
35	114
36	119
37	125
38	130
39	135
40	141
41	146
42	152
43	157
44	163
45	168
46	174
47	180
48	186
49	192
50	198
51	204
52	210
53	216
54	223
55	229

n	a(n)
3	1
4	3
5	4
6	6
7	8
8	11
9	13
10	15
11	18
12	21
13	24
14	27
15	30
16	33
17	37
18	40
19	44
20	48
21	52
22	55
23	60
24	64
25	68
26	72
27	76
28	81
29	85
30	90
31	95
32	100
33	104
34	109
35	114
36	119
37	125
38	130
39	135
40	141
41	146
42	152
43	157
44	163
45	168
46	174
47	180
48	186
49	192
50	198
51	204
52	210
53	216
54	223
55	229

n	a(n)
3	1
4	3
5	4
6	6
7	8
8	11
9	13
10	15
11	18
12	21
13	24
14	27
15	30
16	33
17	37
18	40
19	44
20	48
21	52
22	55
23	60
24	64
25	68
26	72
27	76
28	81
29	85
30	90
31	95
32	100
33	104
34	109
35	114
36	119
37	125
38	130
39	135
40	141
41	146
42	152
43	157
44	163
45	168
46	174
47	180
48	186
49	192
50	198
51	204
52	210
53	216
54	223
55	229