A033098 - cp's OEIS frontend

A033098 Number of 2's when k is written in base b for all b and k satisfying 2<=b<=n+1, 1<=k<=n.

n	a(n)
1	0
2	1
3	1
4	1
5	2
6	4
7	6
8	10
9	12
10	16
11	20
12	24
13	27
14	34
15	38
16	44
17	51
18	58
19	63
20	72
21	77
22	86
23	94
24	103
25	111
26	125
27	132
28	139
29	147
30	156
31	162
32	175
33	183
34	195
35	207
36	217
37	228
38	244
39	253
40	264
41	276
42	292
43	303
44	319
45	329
46	343
47	358
48	370
49	381
50	401
51	415
52	432
53	448

[0, 1, 1, 1, 2, 4, 6, 10, 12, 16, 20, 24, 27, 34, 38, 44, 51, 58, 63, 72, 77, 86, 94, 103, 111, 125, 132, 139, 147, 156, 162, 175, 183, 195, 207, 217, 228, 244, 253, 264, 276, 292, 303, 319, 329, 343, 358, 370, 381, 401, 415, 432, 448]

cp's OEIS Frontend

A033098 Number of 2's when k is written in base b for all b and k satisfying 2<=b<=n+1, 1<=k<=n.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	1
5	2
6	4
7	6
8	10
9	12
10	16
11	20
12	24
13	27
14	34
15	38
16	44
17	51
18	58
19	63
20	72
21	77
22	86
23	94
24	103
25	111
26	125
27	132
28	139
29	147
30	156
31	162
32	175
33	183
34	195
35	207
36	217
37	228
38	244
39	253
40	264
41	276
42	292
43	303
44	319
45	329
46	343
47	358
48	370
49	381
50	401
51	415
52	432
53	448

n	a(n)
1	0
2	1
3	1
4	1
5	2
6	4
7	6
8	10
9	12
10	16
11	20
12	24
13	27
14	34
15	38
16	44
17	51
18	58
19	63
20	72
21	77
22	86
23	94
24	103
25	111
26	125
27	132
28	139
29	147
30	156
31	162
32	175
33	183
34	195
35	207
36	217
37	228
38	244
39	253
40	264
41	276
42	292
43	303
44	319
45	329
46	343
47	358
48	370
49	381
50	401
51	415
52	432
53	448

n	a(n)
1	0
2	1
3	1
4	1
5	2
6	4
7	6
8	10
9	12
10	16
11	20
12	24
13	27
14	34
15	38
16	44
17	51
18	58
19	63
20	72
21	77
22	86
23	94
24	103
25	111
26	125
27	132
28	139
29	147
30	156
31	162
32	175
33	183
34	195
35	207
36	217
37	228
38	244
39	253
40	264
41	276
42	292
43	303
44	319
45	329
46	343
47	358
48	370
49	381
50	401
51	415
52	432
53	448