A130333 - cp's OEIS frontend

A130333 Numbers k >= 1 for which k!!/Sum_{i=1..k} k is an integer.

n	a(n)
0	1
1	5
2	9
3	13
4	14
5	17
6	20
7	21
8	24
9	25
10	26
11	29
12	32
13	33
14	34
15	37
16	38
17	41
18	44
19	45
20	48
21	49
22	50
23	53
24	54
25	56
26	57
27	61
28	62
29	64
30	65
31	68
32	69
33	73
34	74
35	76
36	77
37	80
38	81
39	84
40	85
41	86
42	89
43	90
44	92
45	93
46	94
47	97
48	98
49	101
50	104
51	105
52	109
53	110
54	113
55	114
56	116
57	117
58	118
59	120
60	121
61	122

[1, 5, 9, 13, 14, 17, 20, 21, 24, 25, 26, 29, 32, 33, 34, 37, 38, 41, 44, 45, 48, 49, 50, 53, 54, 56, 57, 61, 62, 64, 65, 68, 69, 73, 74, 76, 77, 80, 81, 84, 85, 86, 89, 90, 92, 93, 94, 97, 98, 101, 104, 105, 109, 110, 113, 114, 116, 117, 118, 120, 121, 122]

cp's OEIS Frontend

A130333 Numbers k >= 1 for which k!!/Sum_{i=1..k} k is an integer.

Table of values

List of values

n	a(n)
0	1
1	5
2	9
3	13
4	14
5	17
6	20
7	21
8	24
9	25
10	26
11	29
12	32
13	33
14	34
15	37
16	38
17	41
18	44
19	45
20	48
21	49
22	50
23	53
24	54
25	56
26	57
27	61
28	62
29	64
30	65
31	68
32	69
33	73
34	74
35	76
36	77
37	80
38	81
39	84
40	85
41	86
42	89
43	90
44	92
45	93
46	94
47	97
48	98
49	101
50	104
51	105
52	109
53	110
54	113
55	114
56	116
57	117
58	118
59	120
60	121
61	122

n	a(n)
0	1
1	5
2	9
3	13
4	14
5	17
6	20
7	21
8	24
9	25
10	26
11	29
12	32
13	33
14	34
15	37
16	38
17	41
18	44
19	45
20	48
21	49
22	50
23	53
24	54
25	56
26	57
27	61
28	62
29	64
30	65
31	68
32	69
33	73
34	74
35	76
36	77
37	80
38	81
39	84
40	85
41	86
42	89
43	90
44	92
45	93
46	94
47	97
48	98
49	101
50	104
51	105
52	109
53	110
54	113
55	114
56	116
57	117
58	118
59	120
60	121
61	122

n	a(n)
0	1
1	5
2	9
3	13
4	14
5	17
6	20
7	21
8	24
9	25
10	26
11	29
12	32
13	33
14	34
15	37
16	38
17	41
18	44
19	45
20	48
21	49
22	50
23	53
24	54
25	56
26	57
27	61
28	62
29	64
30	65
31	68
32	69
33	73
34	74
35	76
36	77
37	80
38	81
39	84
40	85
41	86
42	89
43	90
44	92
45	93
46	94
47	97
48	98
49	101
50	104
51	105
52	109
53	110
54	113
55	114
56	116
57	117
58	118
59	120
60	121
61	122