A300333 - cp's OEIS frontend

A300333 a(n) = max{ p prime | n = Sum_{j in 0:p-1} x^j*y^(p-j-1)} where x and y are positive integers with max(x, y) >= 2 or 0 if no such representation exists.

n	a(n)
1	0
2	0
3	2
4	2
5	0
6	0
7	3
8	0
9	0
10	0
11	0
12	3
13	3
14	0
15	0
16	0
17	0
18	0
19	3
20	0
21	3
22	0
23	0
24	0
25	0
26	0
27	3
28	3
29	0
30	0
31	5
32	0
33	0
34	0
35	0
36	0
37	3
38	0
39	3
40	0
41	0
42	0
43	3
44	0
45	0
46	0
47	0
48	3
49	3
50	0
51	0
52	3
53	0
54	0
55	0
56	0
57	3
58	0
59	0
60	0
61	3
62	0
63	3
64	0
65	0
66	0
67	3
68	0
69	0
70	0
71	0
72	0
73	3
74	0
75	3
76	3
77	0
78	0
79	3
80	5
81	0
82	0
83	0
84	3
85	0
86	0
87	0
88	0
89	0
90	0
91	3
92	0
93	3
94	0
95	0
96	0
97	3
98	0
99	0
100	0
101	0
102	0
103	3
104	0
105	0
106	0
107	0
108	3
109	3
110	0
111	3
112	3
113	0
114	0
115	0
116	0
117	3
118	0
119	0
120	0
121	5

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

cp's OEIS Frontend

A300333 a(n) = max{ p prime | n = Sum_{j in 0:p-1} x^j*y^(p-j-1)} where x and y are positive integers with max(x, y) >= 2 or 0 if no such representation exists.

Table of values

List of values

n	a(n)
1	0
2	0
3	2
4	2
5	0
6	0
7	3
8	0
9	0
10	0
11	0
12	3
13	3
14	0
15	0
16	0
17	0
18	0
19	3
20	0
21	3
22	0
23	0
24	0
25	0
26	0
27	3
28	3
29	0
30	0
31	5
32	0
33	0
34	0
35	0
36	0
37	3
38	0
39	3
40	0
41	0
42	0
43	3
44	0
45	0
46	0
47	0
48	3
49	3
50	0
51	0
52	3
53	0
54	0
55	0
56	0
57	3
58	0
59	0
60	0
61	3
62	0
63	3
64	0
65	0
66	0
67	3
68	0
69	0
70	0
71	0
72	0
73	3
74	0
75	3
76	3
77	0
78	0
79	3
80	5
81	0
82	0
83	0
84	3
85	0
86	0
87	0
88	0
89	0
90	0
91	3
92	0
93	3
94	0
95	0
96	0
97	3
98	0
99	0
100	0
101	0
102	0
103	3
104	0
105	0
106	0
107	0
108	3
109	3
110	0
111	3
112	3
113	0
114	0
115	0
116	0
117	3
118	0
119	0
120	0
121	5

n	a(n)
1	0
2	0
3	2
4	2
5	0
6	0
7	3
8	0
9	0
10	0
11	0
12	3
13	3
14	0
15	0
16	0
17	0
18	0
19	3
20	0
21	3
22	0
23	0
24	0
25	0
26	0
27	3
28	3
29	0
30	0
31	5
32	0
33	0
34	0
35	0
36	0
37	3
38	0
39	3
40	0
41	0
42	0
43	3
44	0
45	0
46	0
47	0
48	3
49	3
50	0
51	0
52	3
53	0
54	0
55	0
56	0
57	3
58	0
59	0
60	0
61	3
62	0
63	3
64	0
65	0
66	0
67	3
68	0
69	0
70	0
71	0
72	0
73	3
74	0
75	3
76	3
77	0
78	0
79	3
80	5
81	0
82	0
83	0
84	3
85	0
86	0
87	0
88	0
89	0
90	0
91	3
92	0
93	3
94	0
95	0
96	0
97	3
98	0
99	0
100	0
101	0
102	0
103	3
104	0
105	0
106	0
107	0
108	3
109	3
110	0
111	3
112	3
113	0
114	0
115	0
116	0
117	3
118	0
119	0
120	0
121	5

n	a(n)
1	0
2	0
3	2
4	2
5	0
6	0
7	3
8	0
9	0
10	0
11	0
12	3
13	3
14	0
15	0
16	0
17	0
18	0
19	3
20	0
21	3
22	0
23	0
24	0
25	0
26	0
27	3
28	3
29	0
30	0
31	5
32	0
33	0
34	0
35	0
36	0
37	3
38	0
39	3
40	0
41	0
42	0
43	3
44	0
45	0
46	0
47	0
48	3
49	3
50	0
51	0
52	3
53	0
54	0
55	0
56	0
57	3
58	0
59	0
60	0
61	3
62	0
63	3
64	0
65	0
66	0
67	3
68	0
69	0
70	0
71	0
72	0
73	3
74	0
75	3
76	3
77	0
78	0
79	3
80	5
81	0
82	0
83	0
84	3
85	0
86	0
87	0
88	0
89	0
90	0
91	3
92	0
93	3
94	0
95	0
96	0
97	3
98	0
99	0
100	0
101	0
102	0
103	3
104	0
105	0
106	0
107	0
108	3
109	3
110	0
111	3
112	3
113	0
114	0
115	0
116	0
117	3
118	0
119	0
120	0
121	5