A273344 - cp's OEIS frontend

A273344 Triangle read by rows: T(n,k) is the number of bargraphs of semiperimeter n having k levels. A level in a bargraph is a maximal sequence of two or more adjacent horizontal steps; it is preceded and followed by either an up step or a down step.

n	a(n)
2	1
3	1
4	1
5	3
6	2
7	6
8	7
9	14
10	19
11	2
12	33
13	53
14	11
15	79
16	148
17	47
18	1
19	194
20	409
21	181
22	10
23	482
24	1137
25	639
26	69
27	1214
28	3159
29	2166
30	360
31	6
32	3090
33	8793
34	7110
35	1646
36	66
37	7936
38	24515
39	22831
40	6868
41	490
42	2
43	20544
44	68443
45	72145
46	26893
47	2918
48	44
49	53545
50	191367
51	225138
52	100598
53	15085
54	486
55	140399
56	535762
57	695798
58	363360
59	70847
60	3825

[1, 1, 1, 3, 2, 6, 7, 14, 19, 2, 33, 53, 11, 79, 148, 47, 1, 194, 409, 181, 10, 482, 1137, 639, 69, 1214, 3159, 2166, 360, 6, 3090, 8793, 7110, 1646, 66, 7936, 24515, 22831, 6868, 490, 2, 20544, 68443, 72145, 26893, 2918, 44, 53545, 191367, 225138, 100598, 15085, 486, 140399, 535762, 695798, 363360, 70847, 3825]

cp's OEIS Frontend

A273344 Triangle read by rows: T(n,k) is the number of bargraphs of semiperimeter n having k levels. A level in a bargraph is a maximal sequence of two or more adjacent horizontal steps; it is preceded and followed by either an up step or a down step.

Table of values

List of values