A023990 - cp's OEIS frontend

A023990 Sum of exponents of primes in multinomial coefficient M(4n; 2n,n,n) - sum of exponents of primes in M(3n; n,n,n).

n	a(n)
0	0
1	1
2	1
3	1
4	2
5	2
6	1
7	3
8	3
9	4
10	4
11	1
12	2
13	4
14	3
15	3
16	5
17	4
18	4
19	3
20	4
21	7
22	4
23	4
24	5
25	7
26	5
27	4
28	5
29	5
30	6
31	6
32	7
33	7
34	9
35	7
36	9
37	11
38	8
39	9
40	9
41	9
42	8
43	6
44	7
45	7
46	6
47	6
48	8
49	9
50	8
51	8
52	9
53	10
54	7
55	8
56	9
57	10
58	11
59	7
60	8
61	11
62	11
63	10
64	12
65	13
66	13
67	12
68	11
69	14
70	12
71	11
72	13
73	14
74	12
75	12
76	14
77	14
78	13
79	14
80	14
81	15
82	15
83	13
84	14
85	14
86	11
87	10
88	13
89	12
90	13
91	13
92	12
93	15

[0, 1, 1, 1, 2, 2, 1, 3, 3, 4, 4, 1, 2, 4, 3, 3, 5, 4, 4, 3, 4, 7, 4, 4, 5, 7, 5, 4, 5, 5, 6, 6, 7, 7, 9, 7, 9, 11, 8, 9, 9, 9, 8, 6, 7, 7, 6, 6, 8, 9, 8, 8, 9, 10, 7, 8, 9, 10, 11, 7, 8, 11, 11, 10, 12, 13, 13, 12, 11, 14, 12, 11, 13, 14, 12, 12, 14, 14, 13, 14, 14, 15, 15, 13, 14, 14, 11, 10, 13, 12, 13, 13, 12, 15]

cp's OEIS Frontend

A023990 Sum of exponents of primes in multinomial coefficient M(4n; 2n,n,n) - sum of exponents of primes in M(3n; n,n,n).

Table of values

List of values

n	a(n)
0	0
1	1
2	1
3	1
4	2
5	2
6	1
7	3
8	3
9	4
10	4
11	1
12	2
13	4
14	3
15	3
16	5
17	4
18	4
19	3
20	4
21	7
22	4
23	4
24	5
25	7
26	5
27	4
28	5
29	5
30	6
31	6
32	7
33	7
34	9
35	7
36	9
37	11
38	8
39	9
40	9
41	9
42	8
43	6
44	7
45	7
46	6
47	6
48	8
49	9
50	8
51	8
52	9
53	10
54	7
55	8
56	9
57	10
58	11
59	7
60	8
61	11
62	11
63	10
64	12
65	13
66	13
67	12
68	11
69	14
70	12
71	11
72	13
73	14
74	12
75	12
76	14
77	14
78	13
79	14
80	14
81	15
82	15
83	13
84	14
85	14
86	11
87	10
88	13
89	12
90	13
91	13
92	12
93	15

n	a(n)
0	0
1	1
2	1
3	1
4	2
5	2
6	1
7	3
8	3
9	4
10	4
11	1
12	2
13	4
14	3
15	3
16	5
17	4
18	4
19	3
20	4
21	7
22	4
23	4
24	5
25	7
26	5
27	4
28	5
29	5
30	6
31	6
32	7
33	7
34	9
35	7
36	9
37	11
38	8
39	9
40	9
41	9
42	8
43	6
44	7
45	7
46	6
47	6
48	8
49	9
50	8
51	8
52	9
53	10
54	7
55	8
56	9
57	10
58	11
59	7
60	8
61	11
62	11
63	10
64	12
65	13
66	13
67	12
68	11
69	14
70	12
71	11
72	13
73	14
74	12
75	12
76	14
77	14
78	13
79	14
80	14
81	15
82	15
83	13
84	14
85	14
86	11
87	10
88	13
89	12
90	13
91	13
92	12
93	15

n	a(n)
0	0
1	1
2	1
3	1
4	2
5	2
6	1
7	3
8	3
9	4
10	4
11	1
12	2
13	4
14	3
15	3
16	5
17	4
18	4
19	3
20	4
21	7
22	4
23	4
24	5
25	7
26	5
27	4
28	5
29	5
30	6
31	6
32	7
33	7
34	9
35	7
36	9
37	11
38	8
39	9
40	9
41	9
42	8
43	6
44	7
45	7
46	6
47	6
48	8
49	9
50	8
51	8
52	9
53	10
54	7
55	8
56	9
57	10
58	11
59	7
60	8
61	11
62	11
63	10
64	12
65	13
66	13
67	12
68	11
69	14
70	12
71	11
72	13
73	14
74	12
75	12
76	14
77	14
78	13
79	14
80	14
81	15
82	15
83	13
84	14
85	14
86	11
87	10
88	13
89	12
90	13
91	13
92	12
93	15