A087913 - cp's OEIS frontend

A087913 Greatest number less than n such that the number of prime factors is one less than that of n; a(1)=0.

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

[0, 1, 1, 3, 1, 5, 1, 6, 7, 7, 1, 10, 1, 13, 13, 12, 1, 15, 1, 15, 19, 19, 1, 20, 23, 23, 26, 26, 1, 26, 1, 24, 31, 31, 31, 30, 1, 37, 37, 30, 1, 39, 1, 39, 39, 43, 1, 40, 47, 49, 47, 51, 1, 52, 53, 52, 53, 53, 1, 52, 1, 61, 62, 48, 61, 65, 1, 65, 67, 69, 1, 60, 1, 73, 74, 74, 73]

cp's OEIS Frontend

A087913 Greatest number less than n such that the number of prime factors is one less than that of n; a(1)=0.

Table of values

List of values

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

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

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