A075789 - cp's OEIS frontend

A075789 Value of i, when n is written as r^i - s^j with the smallest possible r^i (with minimal i) and r, s > 0, i, j > 1; or 0 if n is not of this form.

n	a(n)
1	2
2	3
3	2
4	3
5	2
6	0
7	3
8	2
9	2
10	3
11	3
12	2
13	2
14	0
15	2
16	2
17	2
18	3
19	3
20	2
21	2
22	2
23	3
24	2
25	3
26	3
27	2
28	5
29	2
30	2
31	5
32	2
33	2
34	0
35	2
36	2
37	2
38	2
39	2
40	2
41	2
42	0
43	2
44	3
45	2
46	2
47	7
48	2
49	2
50	0
51	2
52	2
53	2
54	2
55	2
56	2
57	2
58	0
59	2
60	2
61	3
62	0
63	2
64	2
65	2
66	0
67	2
68	2
69	2
70	0
71	2
72	2
73	2
74	5
75	2
76	3
77	2
78	0
79	7
80	2
81	2
82	0
83	2
84	2
85	2
86	0
87	2
88	2
89	2
90	0
91	2
92	2
93	3
94	2
95	2
96	2
97	2
98	3
99	2
100	3
101	7
102	0
103	7
104	2
105	2

[2, 3, 2, 3, 2, 0, 3, 2, 2, 3, 3, 2, 2, 0, 2, 2, 2, 3, 3, 2, 2, 2, 3, 2, 3, 3, 2, 5, 2, 2, 5, 2, 2, 0, 2, 2, 2, 2, 2, 2, 2, 0, 2, 3, 2, 2, 7, 2, 2, 0, 2, 2, 2, 2, 2, 2, 2, 0, 2, 2, 3, 0, 2, 2, 2, 0, 2, 2, 2, 0, 2, 2, 2, 5, 2, 3, 2, 0, 7, 2, 2, 0, 2, 2, 2, 0, 2, 2, 2, 0, 2, 2, 3, 2, 2, 2, 2, 3, 2, 3, 7, 0, 7, 2, 2]

cp's OEIS Frontend

A075789 Value of i, when n is written as r^i - s^j with the smallest possible r^i (with minimal i) and r, s > 0, i, j > 1; or 0 if n is not of this form.

Table of values

List of values

n	a(n)
1	2
2	3
3	2
4	3
5	2
6	0
7	3
8	2
9	2
10	3
11	3
12	2
13	2
14	0
15	2
16	2
17	2
18	3
19	3
20	2
21	2
22	2
23	3
24	2
25	3
26	3
27	2
28	5
29	2
30	2
31	5
32	2
33	2
34	0
35	2
36	2
37	2
38	2
39	2
40	2
41	2
42	0
43	2
44	3
45	2
46	2
47	7
48	2
49	2
50	0
51	2
52	2
53	2
54	2
55	2
56	2
57	2
58	0
59	2
60	2
61	3
62	0
63	2
64	2
65	2
66	0
67	2
68	2
69	2
70	0
71	2
72	2
73	2
74	5
75	2
76	3
77	2
78	0
79	7
80	2
81	2
82	0
83	2
84	2
85	2
86	0
87	2
88	2
89	2
90	0
91	2
92	2
93	3
94	2
95	2
96	2
97	2
98	3
99	2
100	3
101	7
102	0
103	7
104	2
105	2

n	a(n)
1	2
2	3
3	2
4	3
5	2
6	0
7	3
8	2
9	2
10	3
11	3
12	2
13	2
14	0
15	2
16	2
17	2
18	3
19	3
20	2
21	2
22	2
23	3
24	2
25	3
26	3
27	2
28	5
29	2
30	2
31	5
32	2
33	2
34	0
35	2
36	2
37	2
38	2
39	2
40	2
41	2
42	0
43	2
44	3
45	2
46	2
47	7
48	2
49	2
50	0
51	2
52	2
53	2
54	2
55	2
56	2
57	2
58	0
59	2
60	2
61	3
62	0
63	2
64	2
65	2
66	0
67	2
68	2
69	2
70	0
71	2
72	2
73	2
74	5
75	2
76	3
77	2
78	0
79	7
80	2
81	2
82	0
83	2
84	2
85	2
86	0
87	2
88	2
89	2
90	0
91	2
92	2
93	3
94	2
95	2
96	2
97	2
98	3
99	2
100	3
101	7
102	0
103	7
104	2
105	2

n	a(n)
1	2
2	3
3	2
4	3
5	2
6	0
7	3
8	2
9	2
10	3
11	3
12	2
13	2
14	0
15	2
16	2
17	2
18	3
19	3
20	2
21	2
22	2
23	3
24	2
25	3
26	3
27	2
28	5
29	2
30	2
31	5
32	2
33	2
34	0
35	2
36	2
37	2
38	2
39	2
40	2
41	2
42	0
43	2
44	3
45	2
46	2
47	7
48	2
49	2
50	0
51	2
52	2
53	2
54	2
55	2
56	2
57	2
58	0
59	2
60	2
61	3
62	0
63	2
64	2
65	2
66	0
67	2
68	2
69	2
70	0
71	2
72	2
73	2
74	5
75	2
76	3
77	2
78	0
79	7
80	2
81	2
82	0
83	2
84	2
85	2
86	0
87	2
88	2
89	2
90	0
91	2
92	2
93	3
94	2
95	2
96	2
97	2
98	3
99	2
100	3
101	7
102	0
103	7
104	2
105	2