A025431 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

A025431 as a simple table

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

[0,0,0,0,0,0,0,1,0,0,1,0,0,1,0,1,1,0,1,1,0,1,2,1, 1,2,1,1,2,1,2,3,1,2,3,1,1,4,2,3,4,1,4,3,1,5,4,3,4, 4,4,3,4,4,5,7,3,5,7,3,5,8,4,7,7,4,8,6,3,9,10,6,8, 8,7,7,8,8,9,11,7,9,12,6,8,15,8,12,12,7,15,10,8,16, 13,11,13,13,12,11]

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

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

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