A274491 - cp's OEIS frontend

A274491 Triangle read by rows: T(n,k) is the number of bargraphs of semiperimeter n having k horizontal segments of length 1 (n>=2, k>=0). By a horizontal segment of length 1 we mean a horizontal step that is not adjacent to any other horizontal step.

n	a(n)
2	0
3	1
4	1
5	1
6	2
7	1
8	2
9	3
10	5
11	4
12	1
13	6
14	13
15	9
16	7
17	13
18	28
19	32
20	18
21	6
22	27
23	68
24	88
25	58
26	32
27	2
28	57
29	166
30	228
31	207
32	102
33	34
34	123
35	394
36	623
37	621
38	380
39	166
40	20
41	267
42	943
43	1668
44	1812
45	1380
46	630
47	200
48	5
49	584
50	2269
51	4366
52	5348
53	4476
54	2540
55	967
56	155

[0, 1, 1, 1, 2, 1, 2, 3, 5, 4, 1, 6, 13, 9, 7, 13, 28, 32, 18, 6, 27, 68, 88, 58, 32, 2, 57, 166, 228, 207, 102, 34, 123, 394, 623, 621, 380, 166, 20, 267, 943, 1668, 1812, 1380, 630, 200, 5, 584, 2269, 4366, 5348, 4476, 2540, 967, 155]

cp's OEIS Frontend

A274491 Triangle read by rows: T(n,k) is the number of bargraphs of semiperimeter n having k horizontal segments of length 1 (n>=2, k>=0). By a horizontal segment of length 1 we mean a horizontal step that is not adjacent to any other horizontal step.

Table of values

List of values