A025209 - cp's OEIS frontend

A025209 a(n) = floor(floor(S2)/floor(S1)), where S2 and S1 are, respectively, the 2nd and first elementary symmetric functions of {log(k)}, k = 2,3,...,n.

n	a(n)
3	0
4	1
5	2
6	2
7	3
8	4
9	5
10	6
11	8
12	9
13	10
14	11
15	13
16	14
17	15
18	17
19	18
20	20
21	21
22	23
23	24
24	26
25	27
26	29
27	31
28	33
29	34
30	36
31	37
32	39
33	41
34	43
35	44
36	46
37	48
38	50
39	52
40	53
41	55
42	57
43	59
44	61
45	63
46	65
47	67
48	69
49	70
50	72
51	74
52	76
53	78
54	80
55	82
56	84
57	86
58	88
59	90
60	92
61	95

[0, 1, 2, 2, 3, 4, 5, 6, 8, 9, 10, 11, 13, 14, 15, 17, 18, 20, 21, 23, 24, 26, 27, 29, 31, 33, 34, 36, 37, 39, 41, 43, 44, 46, 48, 50, 52, 53, 55, 57, 59, 61, 63, 65, 67, 69, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 95]

cp's OEIS Frontend

A025209 a(n) = floor(floor(S2)/floor(S1)), where S2 and S1 are, respectively, the 2nd and first elementary symmetric functions of {log(k)}, k = 2,3,...,n.

Table of values

List of values

n	a(n)
3	0
4	1
5	2
6	2
7	3
8	4
9	5
10	6
11	8
12	9
13	10
14	11
15	13
16	14
17	15
18	17
19	18
20	20
21	21
22	23
23	24
24	26
25	27
26	29
27	31
28	33
29	34
30	36
31	37
32	39
33	41
34	43
35	44
36	46
37	48
38	50
39	52
40	53
41	55
42	57
43	59
44	61
45	63
46	65
47	67
48	69
49	70
50	72
51	74
52	76
53	78
54	80
55	82
56	84
57	86
58	88
59	90
60	92
61	95

n	a(n)
3	0
4	1
5	2
6	2
7	3
8	4
9	5
10	6
11	8
12	9
13	10
14	11
15	13
16	14
17	15
18	17
19	18
20	20
21	21
22	23
23	24
24	26
25	27
26	29
27	31
28	33
29	34
30	36
31	37
32	39
33	41
34	43
35	44
36	46
37	48
38	50
39	52
40	53
41	55
42	57
43	59
44	61
45	63
46	65
47	67
48	69
49	70
50	72
51	74
52	76
53	78
54	80
55	82
56	84
57	86
58	88
59	90
60	92
61	95

n	a(n)
3	0
4	1
5	2
6	2
7	3
8	4
9	5
10	6
11	8
12	9
13	10
14	11
15	13
16	14
17	15
18	17
19	18
20	20
21	21
22	23
23	24
24	26
25	27
26	29
27	31
28	33
29	34
30	36
31	37
32	39
33	41
34	43
35	44
36	46
37	48
38	50
39	52
40	53
41	55
42	57
43	59
44	61
45	63
46	65
47	67
48	69
49	70
50	72
51	74
52	76
53	78
54	80
55	82
56	84
57	86
58	88
59	90
60	92
61	95