A305622 - cp's OEIS frontend

A305622 Triangle read by rows: T(n,k) is the number of chiral pairs of rows of n colors with exactly k different colors.

n	a(n)
1	0
2	0
3	1
4	0
5	2
6	3
7	0
8	6
9	18
10	12
11	0
12	12
13	72
14	120
15	60
16	0
17	28
18	267
19	780
20	900
21	360
22	0
23	56
24	885
25	4188
26	8400
27	7560
28	2520
29	0
30	120
31	2880
32	20400
33	63000
34	95760
35	70560
36	20160
37	0
38	240
39	9000
40	93120
41	417000
42	952560
43	1164240
44	725760
45	181440
46	0
47	496
48	27915
49	409140
50	2551440
51	8217720
52	14817600
53	15120000
54	8164800
55	1814400
56	0
57	992
58	85233
59	1748220
60	14802900
61	64614960
62	161247240
63	239500800
64	209563200
65	99792000
66	19958400

[0, 0, 1, 0, 2, 3, 0, 6, 18, 12, 0, 12, 72, 120, 60, 0, 28, 267, 780, 900, 360, 0, 56, 885, 4188, 8400, 7560, 2520, 0, 120, 2880, 20400, 63000, 95760, 70560, 20160, 0, 240, 9000, 93120, 417000, 952560, 1164240, 725760, 181440, 0, 496, 27915, 409140, 2551440, 8217720, 14817600, 15120000, 8164800, 1814400, 0, 992, 85233, 1748220, 14802900, 64614960, 161247240, 239500800, 209563200, 99792000, 19958400]

cp's OEIS Frontend

A305622 Triangle read by rows: T(n,k) is the number of chiral pairs of rows of n colors with exactly k different colors.

Table of values

List of values