A265891 - cp's OEIS frontend

A265891 a(n) = A099563(A000407(n)); the most significant digit in factorial base representation of (2n+1)! / n!.

n	a(n)
0	1
1	1
2	2
3	1
4	3
5	8
6	2
7	6
8	1
9	3
10	10
11	1
12	5
13	14
14	1
15	5
16	16
17	1
18	5
19	15
20	1
21	4
22	12
23	1
24	3
25	9
26	28
27	2
28	6
29	19
30	1
31	3
32	11
33	35
34	2
35	6
36	19
37	1
38	3
39	10
40	30
41	1
42	4
43	14
44	44
45	2
46	6
47	20
48	61
49	2
50	8
51	25
52	1
53	3
54	10
55	31
56	1
57	3
58	11
59	35
60	1
61	4
62	12
63	38
64	1
65	4
66	12
67	39
68	1
69	4
70	12
71	39
72	1
73	3
74	11
75	36
76	1
77	3
78	10
79	33
80	102
81	3
82	9
83	28
84	89
85	2
86	7
87	23
88	74
89	1
90	6
91	19
92	59

[1, 1, 2, 1, 3, 8, 2, 6, 1, 3, 10, 1, 5, 14, 1, 5, 16, 1, 5, 15, 1, 4, 12, 1, 3, 9, 28, 2, 6, 19, 1, 3, 11, 35, 2, 6, 19, 1, 3, 10, 30, 1, 4, 14, 44, 2, 6, 20, 61, 2, 8, 25, 1, 3, 10, 31, 1, 3, 11, 35, 1, 4, 12, 38, 1, 4, 12, 39, 1, 4, 12, 39, 1, 3, 11, 36, 1, 3, 10, 33, 102, 3, 9, 28, 89, 2, 7, 23, 74, 1, 6, 19, 59]

cp's OEIS Frontend

A265891 a(n) = A099563(A000407(n)); the most significant digit in factorial base representation of (2n+1)! / n!.

Table of values

List of values

n	a(n)
0	1
1	1
2	2
3	1
4	3
5	8
6	2
7	6
8	1
9	3
10	10
11	1
12	5
13	14
14	1
15	5
16	16
17	1
18	5
19	15
20	1
21	4
22	12
23	1
24	3
25	9
26	28
27	2
28	6
29	19
30	1
31	3
32	11
33	35
34	2
35	6
36	19
37	1
38	3
39	10
40	30
41	1
42	4
43	14
44	44
45	2
46	6
47	20
48	61
49	2
50	8
51	25
52	1
53	3
54	10
55	31
56	1
57	3
58	11
59	35
60	1
61	4
62	12
63	38
64	1
65	4
66	12
67	39
68	1
69	4
70	12
71	39
72	1
73	3
74	11
75	36
76	1
77	3
78	10
79	33
80	102
81	3
82	9
83	28
84	89
85	2
86	7
87	23
88	74
89	1
90	6
91	19
92	59

n	a(n)
0	1
1	1
2	2
3	1
4	3
5	8
6	2
7	6
8	1
9	3
10	10
11	1
12	5
13	14
14	1
15	5
16	16
17	1
18	5
19	15
20	1
21	4
22	12
23	1
24	3
25	9
26	28
27	2
28	6
29	19
30	1
31	3
32	11
33	35
34	2
35	6
36	19
37	1
38	3
39	10
40	30
41	1
42	4
43	14
44	44
45	2
46	6
47	20
48	61
49	2
50	8
51	25
52	1
53	3
54	10
55	31
56	1
57	3
58	11
59	35
60	1
61	4
62	12
63	38
64	1
65	4
66	12
67	39
68	1
69	4
70	12
71	39
72	1
73	3
74	11
75	36
76	1
77	3
78	10
79	33
80	102
81	3
82	9
83	28
84	89
85	2
86	7
87	23
88	74
89	1
90	6
91	19
92	59

n	a(n)
0	1
1	1
2	2
3	1
4	3
5	8
6	2
7	6
8	1
9	3
10	10
11	1
12	5
13	14
14	1
15	5
16	16
17	1
18	5
19	15
20	1
21	4
22	12
23	1
24	3
25	9
26	28
27	2
28	6
29	19
30	1
31	3
32	11
33	35
34	2
35	6
36	19
37	1
38	3
39	10
40	30
41	1
42	4
43	14
44	44
45	2
46	6
47	20
48	61
49	2
50	8
51	25
52	1
53	3
54	10
55	31
56	1
57	3
58	11
59	35
60	1
61	4
62	12
63	38
64	1
65	4
66	12
67	39
68	1
69	4
70	12
71	39
72	1
73	3
74	11
75	36
76	1
77	3
78	10
79	33
80	102
81	3
82	9
83	28
84	89
85	2
86	7
87	23
88	74
89	1
90	6
91	19
92	59