A371635 - cp's OEIS frontend

A371635 For any number k >= 0, let T_k be the triangle with values in {-1, 0, +1} whose base corresponds to the balanced ternary expansion of k (without leading zeros) and other values, say t above u and v, satisfy t+u+v = 0 mod 3; the balanced ternary expansion of a(n) corresponds to the left border of T_n (the most significant digit being at the bottom left corner).

n	a(n)
0	0
1	1
2	3
3	2
4	4
5	10
6	8
7	9
8	6
9	7
10	5
11	11
12	12
13	13
14	30
15	29
16	31
17	24
18	23
19	25
20	27
21	26
22	28
23	18
24	17
25	19
26	21
27	20
28	22
29	15
30	14
31	16
32	33
33	32
34	34
35	36
36	35
37	37
38	39
39	38
40	40
41	91
42	89
43	90
44	86
45	87
46	88
47	93
48	94
49	92
50	73
51	71
52	72
53	68
54	69
55	70
56	75
57	76
58	74
59	82
60	80
61	81
62	77
63	78
64	79
65	84
66	85
67	83

[0, 1, 3, 2, 4, 10, 8, 9, 6, 7, 5, 11, 12, 13, 30, 29, 31, 24, 23, 25, 27, 26, 28, 18, 17, 19, 21, 20, 22, 15, 14, 16, 33, 32, 34, 36, 35, 37, 39, 38, 40, 91, 89, 90, 86, 87, 88, 93, 94, 92, 73, 71, 72, 68, 69, 70, 75, 76, 74, 82, 80, 81, 77, 78, 79, 84, 85, 83]

cp's OEIS Frontend

Table of values

List of values

n	a(n)
0	0
1	1
2	3
3	2
4	4
5	10
6	8
7	9
8	6
9	7
10	5
11	11
12	12
13	13
14	30
15	29
16	31
17	24
18	23
19	25
20	27
21	26
22	28
23	18
24	17
25	19
26	21
27	20
28	22
29	15
30	14
31	16
32	33
33	32
34	34
35	36
36	35
37	37
38	39
39	38
40	40
41	91
42	89
43	90
44	86
45	87
46	88
47	93
48	94
49	92
50	73
51	71
52	72
53	68
54	69
55	70
56	75
57	76
58	74
59	82
60	80
61	81
62	77
63	78
64	79
65	84
66	85
67	83

n	a(n)
0	0
1	1
2	3
3	2
4	4
5	10
6	8
7	9
8	6
9	7
10	5
11	11
12	12
13	13
14	30
15	29
16	31
17	24
18	23
19	25
20	27
21	26
22	28
23	18
24	17
25	19
26	21
27	20
28	22
29	15
30	14
31	16
32	33
33	32
34	34
35	36
36	35
37	37
38	39
39	38
40	40
41	91
42	89
43	90
44	86
45	87
46	88
47	93
48	94
49	92
50	73
51	71
52	72
53	68
54	69
55	70
56	75
57	76
58	74
59	82
60	80
61	81
62	77
63	78
64	79
65	84
66	85
67	83

n	a(n)
0	0
1	1
2	3
3	2
4	4
5	10
6	8
7	9
8	6
9	7
10	5
11	11
12	12
13	13
14	30
15	29
16	31
17	24
18	23
19	25
20	27
21	26
22	28
23	18
24	17
25	19
26	21
27	20
28	22
29	15
30	14
31	16
32	33
33	32
34	34
35	36
36	35
37	37
38	39
39	38
40	40
41	91
42	89
43	90
44	86
45	87
46	88
47	93
48	94
49	92
50	73
51	71
52	72
53	68
54	69
55	70
56	75
57	76
58	74
59	82
60	80
61	81
62	77
63	78
64	79
65	84
66	85
67	83