A278817 - cp's OEIS frontend

A278817 The least t such that there exists a sequence n = b_1 < b_2 < ... < b_t = A277278(n) such that b_1 + b_2 +...+ b_t is a perfect square.

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

[1, 1, 3, 2, 1, 5, 2, 2, 6, 1, 3, 3, 2, 4, 3, 3, 1, 2, 4, 3, 3, 5, 2, 2, 2, 1, 3, 4, 4, 2, 2, 2, 3, 4, 4, 6, 1, 5, 3, 2, 2, 5, 5, 5, 3, 3, 3, 3, 2, 1, 6, 6, 3, 3, 3, 3, 6, 6, 2, 2, 2, 4, 4, 3, 1, 7, 7, 4, 4, 2, 2, 2, 3, 3, 3, 5, 5, 5, 5, 4, 2, 1, 2, 2, 2, 5, 5]

cp's OEIS Frontend

A278817 The least t such that there exists a sequence n = b_1 < b_2 < ... < b_t = A277278(n) such that b_1 + b_2 +...+ b_t is a perfect square.

Table of values

List of values

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

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

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