A051907 - cp's OEIS frontend

A051907 Number of ways to express 1 as the sum of distinct unit fractions such that the sum of the denominators is n.

n	a(n)
1	1
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	1
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	0
21	0
22	0
23	0
24	1
25	0
26	0
27	0
28	0
29	0
30	1
31	1
32	1
33	0
34	0
35	0
36	0
37	1
38	1
39	0
40	0
41	0
42	0
43	1
44	0
45	2
46	0
47	0
48	0
49	0
50	2
51	0
52	1
53	1
54	1
55	1
56	0
57	2
58	0
59	1
60	1
61	1
62	2
63	0
64	4
65	1
66	3
67	4
68	0
69	2
70	0
71	6
72	0
73	1
74	2
75	1
76	3
77	0
78	4
79	2
80	1
81	5
82	5
83	3
84	2
85	3
86	3
87	5
88	5
89	5
90	2
91	1
92	12
93	5
94	4
95	11
96	4
97	5
98	2
99	11
100	3
101	5

[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 2, 0, 0, 0, 0, 2, 0, 1, 1, 1, 1, 0, 2, 0, 1, 1, 1, 2, 0, 4, 1, 3, 4, 0, 2, 0, 6, 0, 1, 2, 1, 3, 0, 4, 2, 1, 5, 5, 3, 2, 3, 3, 5, 5, 5, 2, 1, 12, 5, 4, 11, 4, 5, 2, 11, 3, 5]

cp's OEIS Frontend

A051907 Number of ways to express 1 as the sum of distinct 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	0
5	0
6	0
7	0
8	0
9	0
10	0
11	1
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	0
21	0
22	0
23	0
24	1
25	0
26	0
27	0
28	0
29	0
30	1
31	1
32	1
33	0
34	0
35	0
36	0
37	1
38	1
39	0
40	0
41	0
42	0
43	1
44	0
45	2
46	0
47	0
48	0
49	0
50	2
51	0
52	1
53	1
54	1
55	1
56	0
57	2
58	0
59	1
60	1
61	1
62	2
63	0
64	4
65	1
66	3
67	4
68	0
69	2
70	0
71	6
72	0
73	1
74	2
75	1
76	3
77	0
78	4
79	2
80	1
81	5
82	5
83	3
84	2
85	3
86	3
87	5
88	5
89	5
90	2
91	1
92	12
93	5
94	4
95	11
96	4
97	5
98	2
99	11
100	3
101	5

n	a(n)
1	1
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	1
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	0
21	0
22	0
23	0
24	1
25	0
26	0
27	0
28	0
29	0
30	1
31	1
32	1
33	0
34	0
35	0
36	0
37	1
38	1
39	0
40	0
41	0
42	0
43	1
44	0
45	2
46	0
47	0
48	0
49	0
50	2
51	0
52	1
53	1
54	1
55	1
56	0
57	2
58	0
59	1
60	1
61	1
62	2
63	0
64	4
65	1
66	3
67	4
68	0
69	2
70	0
71	6
72	0
73	1
74	2
75	1
76	3
77	0
78	4
79	2
80	1
81	5
82	5
83	3
84	2
85	3
86	3
87	5
88	5
89	5
90	2
91	1
92	12
93	5
94	4
95	11
96	4
97	5
98	2
99	11
100	3
101	5

n	a(n)
1	1
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	1
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	0
21	0
22	0
23	0
24	1
25	0
26	0
27	0
28	0
29	0
30	1
31	1
32	1
33	0
34	0
35	0
36	0
37	1
38	1
39	0
40	0
41	0
42	0
43	1
44	0
45	2
46	0
47	0
48	0
49	0
50	2
51	0
52	1
53	1
54	1
55	1
56	0
57	2
58	0
59	1
60	1
61	1
62	2
63	0
64	4
65	1
66	3
67	4
68	0
69	2
70	0
71	6
72	0
73	1
74	2
75	1
76	3
77	0
78	4
79	2
80	1
81	5
82	5
83	3
84	2
85	3
86	3
87	5
88	5
89	5
90	2
91	1
92	12
93	5
94	4
95	11
96	4
97	5
98	2
99	11
100	3
101	5