A351491 - cp's OEIS frontend

A351491 Irregular triangle read by rows: T(n,k) is the minimum number of alphabetic symbols in a regular expression for the k lexicographically first palindromes of length 2*n over a ternary alphabet, n >= 0, 1 <= k <= 3^n.

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

[0, 2, 4, 6, 4, 6, 8, 12, 14, 16, 20, 22, 24, 6, 8, 10, 14, 16, 18, 22, 24, 26, 32, 34, 36, 40, 42, 44, 48, 50, 52, 58, 60, 62, 66, 68, 70, 74, 76, 78, 8, 10, 12, 16, 18, 20, 24, 26, 28, 34, 36, 38, 42, 44, 46, 50, 52, 54, 60, 62, 64, 68, 70, 72, 76, 78, 80, 88]

cp's OEIS Frontend

A351491 Irregular triangle read by rows: T(n,k) is the minimum number of alphabetic symbols in a regular expression for the k lexicographically first palindromes of length 2*n over a ternary alphabet, n >= 0, 1 <= k <= 3^n.

Table of values

List of values

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

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

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