A171691 - cp's OEIS frontend

A171691 Number of unordered partitions {k1, k2} of n such that k1 and k2 are nonnegative nonprimes A141468.

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

[1, 1, 0, 1, 1, 1, 1, 2, 2, 3, 1, 3, 2, 3, 3, 5, 2, 5, 3, 5, 4, 6, 3, 7, 5, 7, 5, 8, 5, 9, 6, 8, 7, 10, 7, 12, 7, 9, 9, 12, 8, 13, 9, 12, 10, 13, 9, 15, 11, 15, 11, 15, 11, 17, 13, 16, 13, 17, 13, 20, 14, 16, 15, 20, 15, 22, 15, 18, 17, 22, 16, 23, 17, 21, 18, 23, 18, 26, 18, 23]

cp's OEIS Frontend

A171691 Number of unordered partitions {k1, k2} of n such that k1 and k2 are nonnegative nonprimes A141468.

Table of values

List of values

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

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

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