A083906 - cp's OEIS frontend

A083906 Table read by rows: T(n, k) is the number of length n binary words with exactly k inversions.

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

[1, 2, 3, 1, 4, 2, 2, 5, 3, 4, 3, 1, 6, 4, 6, 6, 6, 2, 2, 7, 5, 8, 9, 11, 9, 7, 4, 3, 1, 8, 6, 10, 12, 16, 16, 18, 12, 12, 8, 6, 2, 2, 9, 7, 12, 15, 21, 23, 29, 27, 26, 23, 21, 15, 13, 7, 4, 3, 1, 10, 8, 14, 18, 26, 30, 40, 42, 48, 44, 46, 40, 40, 30, 26, 18, 14, 8, 6, 2, 2]

cp's OEIS Frontend

A083906 Table read by rows: T(n, k) is the number of length n binary words with exactly k inversions.

Table of values

List of values

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

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

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