A213668 - cp's OEIS frontend

A213668 Irregular triangle read by rows: T(n,k) is the number of dominating subsets with k vertices of the graph G(n) consisting of a pair of endvertices joined by n internally disjoint paths of length 2 (the n-ary generalized theta graph THETA_{2,2,...2}; n>=1, 1<=k<=n+2).

n	a(n)
1	1
2	3
3	1
4	0
5	6
6	4
7	1
8	0
9	7
10	10
11	5
12	1
13	0
14	9
15	16
16	15
17	6
18	1
19	0
20	11
21	25
22	30
23	21
24	7
25	1
26	0
27	13
28	36
29	55
30	50
31	28
32	8
33	1
34	0
35	15
36	49
37	91
38	105
39	77
40	36
41	9
42	1
43	0
44	17
45	64
46	140
47	196
48	182
49	112
50	45
51	10
52	1
53	0
54	19
55	81
56	204
57	336
58	378
59	294
60	156
61	55
62	11
63	1

[1, 3, 1, 0, 6, 4, 1, 0, 7, 10, 5, 1, 0, 9, 16, 15, 6, 1, 0, 11, 25, 30, 21, 7, 1, 0, 13, 36, 55, 50, 28, 8, 1, 0, 15, 49, 91, 105, 77, 36, 9, 1, 0, 17, 64, 140, 196, 182, 112, 45, 10, 1, 0, 19, 81, 204, 336, 378, 294, 156, 55, 11, 1]

cp's OEIS Frontend

A213668 Irregular triangle read by rows: T(n,k) is the number of dominating subsets with k vertices of the graph G(n) consisting of a pair of endvertices joined by n internally disjoint paths of length 2 (the n-ary generalized theta graph THETA_{2,2,...2}; n>=1, 1<=k<=n+2).

Table of values

List of values

n	a(n)
1	1
2	3
3	1
4	0
5	6
6	4
7	1
8	0
9	7
10	10
11	5
12	1
13	0
14	9
15	16
16	15
17	6
18	1
19	0
20	11
21	25
22	30
23	21
24	7
25	1
26	0
27	13
28	36
29	55
30	50
31	28
32	8
33	1
34	0
35	15
36	49
37	91
38	105
39	77
40	36
41	9
42	1
43	0
44	17
45	64
46	140
47	196
48	182
49	112
50	45
51	10
52	1
53	0
54	19
55	81
56	204
57	336
58	378
59	294
60	156
61	55
62	11
63	1

n	a(n)
1	1
2	3
3	1
4	0
5	6
6	4
7	1
8	0
9	7
10	10
11	5
12	1
13	0
14	9
15	16
16	15
17	6
18	1
19	0
20	11
21	25
22	30
23	21
24	7
25	1
26	0
27	13
28	36
29	55
30	50
31	28
32	8
33	1
34	0
35	15
36	49
37	91
38	105
39	77
40	36
41	9
42	1
43	0
44	17
45	64
46	140
47	196
48	182
49	112
50	45
51	10
52	1
53	0
54	19
55	81
56	204
57	336
58	378
59	294
60	156
61	55
62	11
63	1

n	a(n)
1	1
2	3
3	1
4	0
5	6
6	4
7	1
8	0
9	7
10	10
11	5
12	1
13	0
14	9
15	16
16	15
17	6
18	1
19	0
20	11
21	25
22	30
23	21
24	7
25	1
26	0
27	13
28	36
29	55
30	50
31	28
32	8
33	1
34	0
35	15
36	49
37	91
38	105
39	77
40	36
41	9
42	1
43	0
44	17
45	64
46	140
47	196
48	182
49	112
50	45
51	10
52	1
53	0
54	19
55	81
56	204
57	336
58	378
59	294
60	156
61	55
62	11
63	1