A378340 - cp's OEIS frontend

A378340 Triangle read by rows: T(n,k) is the number of n node connected achiral planar maps with an external face and k triangular internal faces, n >= 3, 1 <= k <= 2*n - 5.

n	a(n)
3	1
4	0
5	1
6	1
7	0
8	1
9	1
10	2
11	1
12	0
13	0
14	2
15	3
16	3
17	4
18	3
19	0
20	0
21	2
22	4
23	7
24	8
25	7
26	10
27	8
28	0
29	0
30	0
31	4
32	8
33	15
34	19
35	22
36	19
37	29
38	23
39	0
40	0
41	0
42	3
43	11
44	22
45	32
46	48
47	57
48	65
49	57
50	86
51	68
52	0
53	0
54	0
55	0
56	8
57	25
58	47
59	82
60	104
61	150
62	175
63	200
64	176
65	266
66	215
67	0
68	0
69	0
70	0
71	7
72	26
73	64
74	123
75	186
76	288
77	346
78	488
79	556
80	634
81	557
82	844
83	680

[1, 0, 1, 1, 0, 1, 1, 2, 1, 0, 0, 2, 3, 3, 4, 3, 0, 0, 2, 4, 7, 8, 7, 10, 8, 0, 0, 0, 4, 8, 15, 19, 22, 19, 29, 23, 0, 0, 0, 3, 11, 22, 32, 48, 57, 65, 57, 86, 68, 0, 0, 0, 0, 8, 25, 47, 82, 104, 150, 175, 200, 176, 266, 215, 0, 0, 0, 0, 7, 26, 64, 123, 186, 288, 346, 488, 556, 634, 557, 844, 680]

cp's OEIS Frontend

A378340 Triangle read by rows: T(n,k) is the number of n node connected achiral planar maps with an external face and k triangular internal faces, n >= 3, 1 <= k <= 2*n - 5.

Table of values

List of values

n	a(n)
3	1
4	0
5	1
6	1
7	0
8	1
9	1
10	2
11	1
12	0
13	0
14	2
15	3
16	3
17	4
18	3
19	0
20	0
21	2
22	4
23	7
24	8
25	7
26	10
27	8
28	0
29	0
30	0
31	4
32	8
33	15
34	19
35	22
36	19
37	29
38	23
39	0
40	0
41	0
42	3
43	11
44	22
45	32
46	48
47	57
48	65
49	57
50	86
51	68
52	0
53	0
54	0
55	0
56	8
57	25
58	47
59	82
60	104
61	150
62	175
63	200
64	176
65	266
66	215
67	0
68	0
69	0
70	0
71	7
72	26
73	64
74	123
75	186
76	288
77	346
78	488
79	556
80	634
81	557
82	844
83	680

n	a(n)
3	1
4	0
5	1
6	1
7	0
8	1
9	1
10	2
11	1
12	0
13	0
14	2
15	3
16	3
17	4
18	3
19	0
20	0
21	2
22	4
23	7
24	8
25	7
26	10
27	8
28	0
29	0
30	0
31	4
32	8
33	15
34	19
35	22
36	19
37	29
38	23
39	0
40	0
41	0
42	3
43	11
44	22
45	32
46	48
47	57
48	65
49	57
50	86
51	68
52	0
53	0
54	0
55	0
56	8
57	25
58	47
59	82
60	104
61	150
62	175
63	200
64	176
65	266
66	215
67	0
68	0
69	0
70	0
71	7
72	26
73	64
74	123
75	186
76	288
77	346
78	488
79	556
80	634
81	557
82	844
83	680

n	a(n)
3	1
4	0
5	1
6	1
7	0
8	1
9	1
10	2
11	1
12	0
13	0
14	2
15	3
16	3
17	4
18	3
19	0
20	0
21	2
22	4
23	7
24	8
25	7
26	10
27	8
28	0
29	0
30	0
31	4
32	8
33	15
34	19
35	22
36	19
37	29
38	23
39	0
40	0
41	0
42	3
43	11
44	22
45	32
46	48
47	57
48	65
49	57
50	86
51	68
52	0
53	0
54	0
55	0
56	8
57	25
58	47
59	82
60	104
61	150
62	175
63	200
64	176
65	266
66	215
67	0
68	0
69	0
70	0
71	7
72	26
73	64
74	123
75	186
76	288
77	346
78	488
79	556
80	634
81	557
82	844
83	680