A136405 - cp's OEIS frontend

A136405 Triangle read by rows: T(n,k) is the number of bi-partitions of the pair (n,k) into pairs (n_i,k_i) of positive integers such that sum k_i = k and sum n_i*k_i = n.

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

[1, 1, 2, 1, 1, 3, 1, 3, 2, 5, 1, 2, 4, 3, 7, 1, 4, 6, 7, 5, 11, 1, 3, 7, 8, 11, 7, 15, 1, 5, 8, 16, 14, 17, 11, 22, 1, 4, 12, 14, 23, 21, 25, 15, 30, 1, 6, 12, 24, 29, 38, 33, 37, 22, 42, 1, 5, 15, 24, 41, 42, 57, 47, 52, 30, 56, 1, 7, 18, 37, 47, 75, 68, 87, 70, 74, 42, 77]

cp's OEIS Frontend

A136405 Triangle read by rows: T(n,k) is the number of bi-partitions of the pair (n,k) into pairs (n_i,k_i) of positive integers such that sum k_i = k and sum n_i*k_i = n.

Table of values

List of values

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

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

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