A121722 - cp's OEIS frontend

A121722 Triangle T(n,k) = 1 + kn(n+1)/2, read by rows.

n	a(n)
0	1
1	1
2	2
3	1
4	4
5	7
6	1
7	7
8	13
9	19
10	1
11	11
12	21
13	31
14	41
15	1
16	16
17	31
18	46
19	61
20	76
21	1
22	22
23	43
24	64
25	85
26	106
27	127
28	1
29	29
30	57
31	85
32	113
33	141
34	169
35	197
36	1
37	37
38	73
39	109
40	145
41	181
42	217
43	253
44	289
45	1
46	46
47	91
48	136
49	181
50	226
51	271
52	316
53	361
54	406
55	1
56	56
57	111
58	166
59	221
60	276
61	331
62	386
63	441
64	496
65	551

[1, 1, 2, 1, 4, 7, 1, 7, 13, 19, 1, 11, 21, 31, 41, 1, 16, 31, 46, 61, 76, 1, 22, 43, 64, 85, 106, 127, 1, 29, 57, 85, 113, 141, 169, 197, 1, 37, 73, 109, 145, 181, 217, 253, 289, 1, 46, 91, 136, 181, 226, 271, 316, 361, 406, 1, 56, 111, 166, 221, 276, 331, 386, 441, 496, 551]

cp's OEIS Frontend

A121722 Triangle T(n,k) = 1 + kn(n+1)/2, read by rows.

Table of values

List of values

n	a(n)
0	1
1	1
2	2
3	1
4	4
5	7
6	1
7	7
8	13
9	19
10	1
11	11
12	21
13	31
14	41
15	1
16	16
17	31
18	46
19	61
20	76
21	1
22	22
23	43
24	64
25	85
26	106
27	127
28	1
29	29
30	57
31	85
32	113
33	141
34	169
35	197
36	1
37	37
38	73
39	109
40	145
41	181
42	217
43	253
44	289
45	1
46	46
47	91
48	136
49	181
50	226
51	271
52	316
53	361
54	406
55	1
56	56
57	111
58	166
59	221
60	276
61	331
62	386
63	441
64	496
65	551

n	a(n)
0	1
1	1
2	2
3	1
4	4
5	7
6	1
7	7
8	13
9	19
10	1
11	11
12	21
13	31
14	41
15	1
16	16
17	31
18	46
19	61
20	76
21	1
22	22
23	43
24	64
25	85
26	106
27	127
28	1
29	29
30	57
31	85
32	113
33	141
34	169
35	197
36	1
37	37
38	73
39	109
40	145
41	181
42	217
43	253
44	289
45	1
46	46
47	91
48	136
49	181
50	226
51	271
52	316
53	361
54	406
55	1
56	56
57	111
58	166
59	221
60	276
61	331
62	386
63	441
64	496
65	551

cp's OEIS Frontend

A121722 Triangle T(n,k) = 1 + k*n*(n+1)/2, read by rows.

Table of values

List of values

A121722 Triangle T(n,k) = 1 + kn(n+1)/2, read by rows.

n	a(n)
0	1
1	1
2	2
3	1
4	4
5	7
6	1
7	7
8	13
9	19
10	1
11	11
12	21
13	31
14	41
15	1
16	16
17	31
18	46
19	61
20	76
21	1
22	22
23	43
24	64
25	85
26	106
27	127
28	1
29	29
30	57
31	85
32	113
33	141
34	169
35	197
36	1
37	37
38	73
39	109
40	145
41	181
42	217
43	253
44	289
45	1
46	46
47	91
48	136
49	181
50	226
51	271
52	316
53	361
54	406
55	1
56	56
57	111
58	166
59	221
60	276
61	331
62	386
63	441
64	496
65	551