A097847 - cp's OEIS frontend

A097847 Triangle read by rows: T(n,k) = minimal number of terms needed to write k/n (for 1 <= k <= n) as a sum of unit fractions.

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

[1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 2, 2, 3, 1, 1, 1, 1, 2, 2, 1, 1, 2, 3, 2, 3, 3, 1, 1, 1, 2, 1, 2, 2, 3, 1, 1, 2, 1, 2, 2, 2, 3, 3, 1, 1, 1, 2, 2, 1, 2, 2, 3, 3, 1, 1, 2, 2, 2, 3, 2, 3, 4, 4, 4, 1, 1, 1, 1, 1, 2, 1, 2, 2, 2, 2, 3, 1, 1, 2, 3, 3, 3, 3, 2, 3, 3, 3, 3, 4, 1, 1, 1, 2, 2, 2, 3, 1, 2]

cp's OEIS Frontend

A097847 Triangle read by rows: T(n,k) = minimal number of terms needed to write k/n (for 1 <= k <= n) as a sum of unit fractions.

Table of values

List of values

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

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

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