A339941 - cp's OEIS frontend

A339941 Triangle read by rows: T(n,k) is the number of permutations of {1,...,n} whose longest embedded arithmetic progression has length k.

n	a(n)
1	1
2	0
3	2
4	0
5	4
6	2
7	0
8	10
9	12
10	2
11	0
12	20
13	82
14	16
15	2
16	0
17	48
18	516
19	134
20	20
21	2
22	0
23	104
24	3232
25	1480
26	198
27	24
28	2
29	0
30	282
31	21984
32	15702
33	2048
34	274
35	28
36	2
37	0
38	496
39	168368
40	162368
41	28048
42	3204
43	362
44	32
45	2
46	0
47	1066
48	1306404
49	1902496
50	374194
51	39420
52	4720
53	462
54	36
55	2
56	0
57	2460
58	11064306
59	23226786
60	4929828
61	622140
62	64020
63	6644
64	574
65	40
66	2

[1, 0, 2, 0, 4, 2, 0, 10, 12, 2, 0, 20, 82, 16, 2, 0, 48, 516, 134, 20, 2, 0, 104, 3232, 1480, 198, 24, 2, 0, 282, 21984, 15702, 2048, 274, 28, 2, 0, 496, 168368, 162368, 28048, 3204, 362, 32, 2, 0, 1066, 1306404, 1902496, 374194, 39420, 4720, 462, 36, 2, 0, 2460, 11064306, 23226786, 4929828, 622140, 64020, 6644, 574, 40, 2]

cp's OEIS Frontend

A339941 Triangle read by rows: T(n,k) is the number of permutations of {1,...,n} whose longest embedded arithmetic progression has length k.

Table of values

List of values