A317304 - cp's OEIS frontend

A317304 Numbers k with the property that both Dyck paths of the symmetric representation of sigma(k) have a central valley.

n	a(n)
1	4
2	5
3	11
4	12
5	13
6	14
7	22
8	23
9	24
10	25
11	26
12	27
13	37
14	38
15	39
16	40
17	41
18	42
19	43
20	44
21	56
22	57
23	58
24	59
25	60
26	61
27	62
28	63
29	64
30	65
31	79
32	80
33	81
34	82
35	83
36	84
37	85
38	86
39	87
40	88
41	89
42	90
43	106
44	107
45	108
46	109
47	110
48	111
49	112
50	113
51	114
52	115
53	116
54	117
55	118
56	119
57	137
58	138
59	139
60	140
61	141
62	142
63	143
64	144
65	145
66	146
67	147
68	148
69	149

[4, 5, 11, 12, 13, 14, 22, 23, 24, 25, 26, 27, 37, 38, 39, 40, 41, 42, 43, 44, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149]

cp's OEIS Frontend

A317304 Numbers k with the property that both Dyck paths of the symmetric representation of sigma(k) have a central valley.

Table of values

List of values

n	a(n)
1	4
2	5
3	11
4	12
5	13
6	14
7	22
8	23
9	24
10	25
11	26
12	27
13	37
14	38
15	39
16	40
17	41
18	42
19	43
20	44
21	56
22	57
23	58
24	59
25	60
26	61
27	62
28	63
29	64
30	65
31	79
32	80
33	81
34	82
35	83
36	84
37	85
38	86
39	87
40	88
41	89
42	90
43	106
44	107
45	108
46	109
47	110
48	111
49	112
50	113
51	114
52	115
53	116
54	117
55	118
56	119
57	137
58	138
59	139
60	140
61	141
62	142
63	143
64	144
65	145
66	146
67	147
68	148
69	149

n	a(n)
1	4
2	5
3	11
4	12
5	13
6	14
7	22
8	23
9	24
10	25
11	26
12	27
13	37
14	38
15	39
16	40
17	41
18	42
19	43
20	44
21	56
22	57
23	58
24	59
25	60
26	61
27	62
28	63
29	64
30	65
31	79
32	80
33	81
34	82
35	83
36	84
37	85
38	86
39	87
40	88
41	89
42	90
43	106
44	107
45	108
46	109
47	110
48	111
49	112
50	113
51	114
52	115
53	116
54	117
55	118
56	119
57	137
58	138
59	139
60	140
61	141
62	142
63	143
64	144
65	145
66	146
67	147
68	148
69	149

n	a(n)
1	4
2	5
3	11
4	12
5	13
6	14
7	22
8	23
9	24
10	25
11	26
12	27
13	37
14	38
15	39
16	40
17	41
18	42
19	43
20	44
21	56
22	57
23	58
24	59
25	60
26	61
27	62
28	63
29	64
30	65
31	79
32	80
33	81
34	82
35	83
36	84
37	85
38	86
39	87
40	88
41	89
42	90
43	106
44	107
45	108
46	109
47	110
48	111
49	112
50	113
51	114
52	115
53	116
54	117
55	118
56	119
57	137
58	138
59	139
60	140
61	141
62	142
63	143
64	144
65	145
66	146
67	147
68	148
69	149