A051908 - cp's OEIS frontend

A051908 Number of ways to express 1 as the sum of unit fractions such that the sum of the denominators is n.

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

[1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 3, 0, 1, 1, 1, 1, 2, 3, 2, 2, 1, 2, 2, 2, 4, 5, 5, 2, 4, 5, 5, 9, 4, 4, 6, 4, 4, 7, 8, 4, 10, 9, 9, 11, 8, 13, 13, 15, 16, 21, 18, 16, 22, 19, 18, 30, 24, 19, 26, 28, 26, 29, 35, 29, 44, 28, 47, 48]

cp's OEIS Frontend

A051908 Number of ways to express 1 as the sum of unit fractions such that the sum of the denominators is n.

Table of values

List of values

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

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

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