A281527 - cp's OEIS frontend

A281527 Triangle read by rows: T(n,k) = minimal number of terms needed to write k/n as a signed sum of distinct unit fractions, 1 <= k < n.

n	a(n)
2	1
3	1
4	2
5	1
6	1
7	2
8	1
9	2
10	2
11	2
12	1
13	1
14	1
15	2
16	2
17	1
18	2
19	2
20	2
21	3
22	2
23	1
24	1
25	2
26	1
27	2
28	2
29	2
30	1
31	2
32	1
33	2
34	2
35	2
36	3
37	2
38	1
39	1
40	2
41	2
42	1
43	2
44	2
45	2
46	2
47	1
48	2
49	2
50	2
51	2
52	2
53	3
54	3
55	3
56	2
57	1
58	1
59	1
60	1
61	2
62	1
63	2
64	2
65	2
66	2
67	2
68	1
69	2
70	2
71	2
72	3
73	2
74	2
75	3
76	3
77	3
78	3
79	2
80	1
81	1
82	2
83	2
84	2
85	2
86	1
87	2
88	2
89	3
90	3
91	2
92	2
93	1
94	2
95	1
96	2
97	1
98	2
99	2
100	2
101	2
102	2
103	3
104	2
105	3
106	2

[1, 1, 2, 1, 1, 2, 1, 2, 2, 2, 1, 1, 1, 2, 2, 1, 2, 2, 2, 3, 2, 1, 1, 2, 1, 2, 2, 2, 1, 2, 1, 2, 2, 2, 3, 2, 1, 1, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 3, 3, 3, 2, 1, 1, 1, 1, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 2, 3, 2, 2, 3, 3, 3, 3, 2, 1, 1, 2, 2, 2, 2, 1, 2, 2, 3, 3, 2, 2, 1, 2, 1, 2, 1, 2, 2, 2, 2, 2, 3, 2, 3, 2]

cp's OEIS Frontend

A281527 Triangle read by rows: T(n,k) = minimal number of terms needed to write k/n as a signed sum of distinct unit fractions, 1 <= k < n.

Table of values

List of values

n	a(n)
2	1
3	1
4	2
5	1
6	1
7	2
8	1
9	2
10	2
11	2
12	1
13	1
14	1
15	2
16	2
17	1
18	2
19	2
20	2
21	3
22	2
23	1
24	1
25	2
26	1
27	2
28	2
29	2
30	1
31	2
32	1
33	2
34	2
35	2
36	3
37	2
38	1
39	1
40	2
41	2
42	1
43	2
44	2
45	2
46	2
47	1
48	2
49	2
50	2
51	2
52	2
53	3
54	3
55	3
56	2
57	1
58	1
59	1
60	1
61	2
62	1
63	2
64	2
65	2
66	2
67	2
68	1
69	2
70	2
71	2
72	3
73	2
74	2
75	3
76	3
77	3
78	3
79	2
80	1
81	1
82	2
83	2
84	2
85	2
86	1
87	2
88	2
89	3
90	3
91	2
92	2
93	1
94	2
95	1
96	2
97	1
98	2
99	2
100	2
101	2
102	2
103	3
104	2
105	3
106	2

n	a(n)
2	1
3	1
4	2
5	1
6	1
7	2
8	1
9	2
10	2
11	2
12	1
13	1
14	1
15	2
16	2
17	1
18	2
19	2
20	2
21	3
22	2
23	1
24	1
25	2
26	1
27	2
28	2
29	2
30	1
31	2
32	1
33	2
34	2
35	2
36	3
37	2
38	1
39	1
40	2
41	2
42	1
43	2
44	2
45	2
46	2
47	1
48	2
49	2
50	2
51	2
52	2
53	3
54	3
55	3
56	2
57	1
58	1
59	1
60	1
61	2
62	1
63	2
64	2
65	2
66	2
67	2
68	1
69	2
70	2
71	2
72	3
73	2
74	2
75	3
76	3
77	3
78	3
79	2
80	1
81	1
82	2
83	2
84	2
85	2
86	1
87	2
88	2
89	3
90	3
91	2
92	2
93	1
94	2
95	1
96	2
97	1
98	2
99	2
100	2
101	2
102	2
103	3
104	2
105	3
106	2

n	a(n)
2	1
3	1
4	2
5	1
6	1
7	2
8	1
9	2
10	2
11	2
12	1
13	1
14	1
15	2
16	2
17	1
18	2
19	2
20	2
21	3
22	2
23	1
24	1
25	2
26	1
27	2
28	2
29	2
30	1
31	2
32	1
33	2
34	2
35	2
36	3
37	2
38	1
39	1
40	2
41	2
42	1
43	2
44	2
45	2
46	2
47	1
48	2
49	2
50	2
51	2
52	2
53	3
54	3
55	3
56	2
57	1
58	1
59	1
60	1
61	2
62	1
63	2
64	2
65	2
66	2
67	2
68	1
69	2
70	2
71	2
72	3
73	2
74	2
75	3
76	3
77	3
78	3
79	2
80	1
81	1
82	2
83	2
84	2
85	2
86	1
87	2
88	2
89	3
90	3
91	2
92	2
93	1
94	2
95	1
96	2
97	1
98	2
99	2
100	2
101	2
102	2
103	3
104	2
105	3
106	2