A175608 - cp's OEIS frontend

A175608 Characteristic function of squarefree triangular integers: 1 if n(n+1)/2 is squarefree else 0.

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

[1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1]

cp's OEIS Frontend

A175608 Characteristic function of squarefree triangular integers: 1 if n(n+1)/2 is squarefree else 0.

Table of values

List of values

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

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

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