A088910 - cp's OEIS frontend

A088910 Conjectured minimal required number k of terms in a representation n=sum_(i=1..k)e_i*(p_i)^2 by distinct primes p_i, where e_i is 1 or -1.

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

[4, 3, 4, 4, 1, 2, 5, 5, 4, 1, 4, 4, 3, 2, 4, 3, 2, 5, 5, 4, 3, 2, 4, 3, 2, 1, 4, 4, 3, 2, 3, 5, 4, 3, 2, 4, 3, 4, 3, 3, 2, 5, 5, 4, 3, 2, 4, 3, 2, 1, 4, 4, 3, 2, 3, 5, 4, 3, 2, 4, 5, 4, 3, 3, 4, 3, 5, 4, 3, 4, 3, 3, 2, 3, 2, 4, 3, 4, 3, 4, 4, 3, 4, 3, 5, 4, 4, 3, 4, 5, 5, 4, 3, 4, 4, 3, 2, 3, 4, 4, 3, 4, 5, 5, 4]

cp's OEIS Frontend

A088910 Conjectured minimal required number k of terms in a representation n=sum_(i=1..k)e_i*(p_i)^2 by distinct primes p_i, where e_i is 1 or -1.

Table of values

List of values

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

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

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