A240672 - cp's OEIS frontend

A240672 Number of the first evil exponents (A001969) in the prime power factorization of (2n)!.

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

[0, 1, 0, 0, 0, 2, 0, 3, 0, 1, 0, 0, 4, 0, 0, 0, 0, 2, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 2, 0, 1, 2, 0, 1, 0, 0, 2, 0, 0, 2, 0, 0, 0, 1, 1, 0, 2, 0, 2, 0, 0, 1, 1, 0, 2, 0, 0, 0, 9, 2, 0, 1, 1, 0, 0, 2, 0, 0, 1, 0, 0, 1, 0, 0, 0, 2, 1, 0, 2, 0, 3, 0, 0, 1, 1, 0, 2]

cp's OEIS Frontend

A240672 Number of the first evil exponents (A001969) in the prime power factorization of (2n)!.

Table of values

List of values

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

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

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