A274486 - cp's OEIS frontend

A274486 Triangle read by rows: T(n,k) is the number of bargraphs of semiperimeter n having k horizontal segments (n>=2, k>=1). A horizontal segment is a maximal sequence of adjacent horizontal steps (1,0).

n	a(n)
2	1
3	2
4	3
5	2
6	4
7	8
8	1
9	5
10	20
11	10
12	6
13	40
14	45
15	6
16	7
17	70
18	140
19	56
20	2
21	8
22	112
23	350
24	280
25	44
26	9
27	168
28	756
29	1008
30	366
31	20
32	10
33	240
34	1470
35	2940
36	1920
37	320
38	5
39	11
40	330
41	2640
42	7392
43	7590
44	2552
45	190
46	12
47	440
48	4455
49	16632
50	24684
51	13904
52	2445
53	70

[1, 2, 3, 2, 4, 8, 1, 5, 20, 10, 6, 40, 45, 6, 7, 70, 140, 56, 2, 8, 112, 350, 280, 44, 9, 168, 756, 1008, 366, 20, 10, 240, 1470, 2940, 1920, 320, 5, 11, 330, 2640, 7392, 7590, 2552, 190, 12, 440, 4455, 16632, 24684, 13904, 2445, 70]

cp's OEIS Frontend

A274486 Triangle read by rows: T(n,k) is the number of bargraphs of semiperimeter n having k horizontal segments (n>=2, k>=1). A horizontal segment is a maximal sequence of adjacent horizontal steps (1,0).

Table of values

List of values