A158031 - cp's OEIS frontend

A158031 Sides of equilateral triangles which are filled exactly (no holes, no overlaps) by the digits used to write a subsequence of consecutive triangular numbers, starting with 0.

n	a(n)
1	1
2	2
3	3
4	4
5	8
6	9
7	11
8	12
9	14
10	17
11	22
12	25
13	30
14	33
15	36
16	38
17	41
18	43
19	46
20	48
21	51
22	53
23	56
24	58
25	61
26	63
27	65
28	66
29	69
30	74
31	77
32	78
33	81
34	86
35	89
36	90
37	93
38	98
39	101
40	102
41	105
42	110
43	113
44	114
45	117
46	122
47	125
48	126
49	132
50	133
51	139
52	140
53	146
54	147
55	153
56	154
57	160
58	161
59	167
60	168
61	174
62	175
63	181

[1, 2, 3, 4, 8, 9, 11, 12, 14, 17, 22, 25, 30, 33, 36, 38, 41, 43, 46, 48, 51, 53, 56, 58, 61, 63, 65, 66, 69, 74, 77, 78, 81, 86, 89, 90, 93, 98, 101, 102, 105, 110, 113, 114, 117, 122, 125, 126, 132, 133, 139, 140, 146, 147, 153, 154, 160, 161, 167, 168, 174, 175, 181]

cp's OEIS Frontend

A158031 Sides of equilateral triangles which are filled exactly (no holes, no overlaps) by the digits used to write a subsequence of consecutive triangular numbers, starting with 0.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	8
6	9
7	11
8	12
9	14
10	17
11	22
12	25
13	30
14	33
15	36
16	38
17	41
18	43
19	46
20	48
21	51
22	53
23	56
24	58
25	61
26	63
27	65
28	66
29	69
30	74
31	77
32	78
33	81
34	86
35	89
36	90
37	93
38	98
39	101
40	102
41	105
42	110
43	113
44	114
45	117
46	122
47	125
48	126
49	132
50	133
51	139
52	140
53	146
54	147
55	153
56	154
57	160
58	161
59	167
60	168
61	174
62	175
63	181

n	a(n)
1	1
2	2
3	3
4	4
5	8
6	9
7	11
8	12
9	14
10	17
11	22
12	25
13	30
14	33
15	36
16	38
17	41
18	43
19	46
20	48
21	51
22	53
23	56
24	58
25	61
26	63
27	65
28	66
29	69
30	74
31	77
32	78
33	81
34	86
35	89
36	90
37	93
38	98
39	101
40	102
41	105
42	110
43	113
44	114
45	117
46	122
47	125
48	126
49	132
50	133
51	139
52	140
53	146
54	147
55	153
56	154
57	160
58	161
59	167
60	168
61	174
62	175
63	181

n	a(n)
1	1
2	2
3	3
4	4
5	8
6	9
7	11
8	12
9	14
10	17
11	22
12	25
13	30
14	33
15	36
16	38
17	41
18	43
19	46
20	48
21	51
22	53
23	56
24	58
25	61
26	63
27	65
28	66
29	69
30	74
31	77
32	78
33	81
34	86
35	89
36	90
37	93
38	98
39	101
40	102
41	105
42	110
43	113
44	114
45	117
46	122
47	125
48	126
49	132
50	133
51	139
52	140
53	146
54	147
55	153
56	154
57	160
58	161
59	167
60	168
61	174
62	175
63	181