A330270 - cp's OEIS frontend

A330270 a(n) is the least nonnegative integer k such that n XOR k is a square (where XOR denotes the bitwise XOR operator).

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

[0, 0, 2, 2, 0, 1, 2, 3, 1, 0, 3, 2, 5, 4, 7, 6, 0, 1, 2, 3, 4, 5, 6, 7, 1, 0, 3, 2, 5, 4, 7, 6, 4, 5, 6, 7, 0, 1, 2, 3, 12, 13, 14, 15, 8, 9, 10, 11, 1, 0, 3, 2, 5, 4, 7, 6, 9, 8, 11, 10, 13, 12, 15, 14, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 1]

cp's OEIS Frontend

A330270 a(n) is the least nonnegative integer k such that n XOR k is a square (where XOR denotes the bitwise XOR operator).

Table of values

List of values

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

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

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