A308220 - cp's OEIS frontend

A308220 Number of irreducible Egyptian fractions of denominator n which are the sum of 2 unit fractions.

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

[2, 2, 3, 3, 4, 3, 4, 4, 5, 4, 6, 4, 4, 5, 5, 5, 6, 5, 6, 6, 8, 4, 8, 6, 6, 7, 8, 7, 8, 6, 6, 7, 7, 7, 10, 7, 4, 7, 11, 8, 8, 7, 6, 8, 9, 5, 10, 9, 8, 9, 9, 9, 8, 7, 12, 9, 10, 6, 12, 9, 4, 8, 11, 9, 12, 9, 6, 10, 12, 8, 12, 10, 4, 9, 13, 10, 13, 7, 10, 11, 10, 6, 12, 12, 10, 9, 12, 10, 12, 10, 10, 9, 10, 7, 12, 11, 6, 11, 13, 12]

cp's OEIS Frontend

A308220 Number of irreducible Egyptian fractions of denominator n which are the sum of 2 unit fractions.

Table of values

List of values

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

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

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