A081491 - cp's OEIS frontend

A081491 Triangle read by rows in which the n-th row contains n terms of an arithmetic progression with a common difference of (n-1) and the first term of (n+1)-th row is 1 more than the last term of the n-th row.

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	9
8	12
9	15
10	18
11	19
12	23
13	27
14	31
15	35
16	36
17	41
18	46
19	51
20	56
21	61
22	62
23	68
24	74
25	80
26	86
27	92
28	98
29	99
30	106
31	113
32	120
33	127
34	134
35	141
36	148
37	149
38	157
39	165
40	173
41	181
42	189
43	197
44	205
45	213
46	214
47	223
48	232
49	241
50	250
51	259
52	268
53	277
54	286
55	295
56	296
57	306
58	316
59	326
60	336
61	346

[1, 2, 3, 4, 6, 8, 9, 12, 15, 18, 19, 23, 27, 31, 35, 36, 41, 46, 51, 56, 61, 62, 68, 74, 80, 86, 92, 98, 99, 106, 113, 120, 127, 134, 141, 148, 149, 157, 165, 173, 181, 189, 197, 205, 213, 214, 223, 232, 241, 250, 259, 268, 277, 286, 295, 296, 306, 316, 326, 336, 346]

cp's OEIS Frontend

A081491 Triangle read by rows in which the n-th row contains n terms of an arithmetic progression with a common difference of (n-1) and the first term of (n+1)-th row is 1 more than the last term of the n-th row.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	9
8	12
9	15
10	18
11	19
12	23
13	27
14	31
15	35
16	36
17	41
18	46
19	51
20	56
21	61
22	62
23	68
24	74
25	80
26	86
27	92
28	98
29	99
30	106
31	113
32	120
33	127
34	134
35	141
36	148
37	149
38	157
39	165
40	173
41	181
42	189
43	197
44	205
45	213
46	214
47	223
48	232
49	241
50	250
51	259
52	268
53	277
54	286
55	295
56	296
57	306
58	316
59	326
60	336
61	346

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	9
8	12
9	15
10	18
11	19
12	23
13	27
14	31
15	35
16	36
17	41
18	46
19	51
20	56
21	61
22	62
23	68
24	74
25	80
26	86
27	92
28	98
29	99
30	106
31	113
32	120
33	127
34	134
35	141
36	148
37	149
38	157
39	165
40	173
41	181
42	189
43	197
44	205
45	213
46	214
47	223
48	232
49	241
50	250
51	259
52	268
53	277
54	286
55	295
56	296
57	306
58	316
59	326
60	336
61	346

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	9
8	12
9	15
10	18
11	19
12	23
13	27
14	31
15	35
16	36
17	41
18	46
19	51
20	56
21	61
22	62
23	68
24	74
25	80
26	86
27	92
28	98
29	99
30	106
31	113
32	120
33	127
34	134
35	141
36	148
37	149
38	157
39	165
40	173
41	181
42	189
43	197
44	205
45	213
46	214
47	223
48	232
49	241
50	250
51	259
52	268
53	277
54	286
55	295
56	296
57	306
58	316
59	326
60	336
61	346