A053839 - cp's OEIS frontend

A053839 a(n) = (sum of digits of n written in base 4) modulo 4.

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

[0, 1, 2, 3, 1, 2, 3, 0, 2, 3, 0, 1, 3, 0, 1, 2, 1, 2, 3, 0, 2, 3, 0, 1, 3, 0, 1, 2, 0, 1, 2, 3, 2, 3, 0, 1, 3, 0, 1, 2, 0, 1, 2, 3, 1, 2, 3, 0, 3, 0, 1, 2, 0, 1, 2, 3, 1, 2, 3, 0, 2, 3, 0, 1, 1, 2, 3, 0, 2, 3, 0, 1, 3, 0, 1, 2, 0, 1, 2, 3, 2, 3, 0, 1, 3, 0, 1, 2, 0, 1, 2, 3, 1, 2, 3, 0, 3, 0, 1, 2, 0, 1, 2, 3, 1]

cp's OEIS Frontend

A053839 a(n) = (sum of digits of n written in base 4) modulo 4.

Table of values

List of values

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

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

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