A273903 - cp's OEIS frontend

A273903 Triangle read by rows: T(n,k) is the number of bargraphs of semiperimeter n having k even-length columns (n>=2,k>=0).

n	a(n)
2	1
3	1
4	1
5	2
6	2
7	1
8	4
9	6
10	2
11	1
12	8
13	14
14	10
15	2
16	1
17	16
18	35
19	28
20	15
21	2
22	1
23	33
24	84
25	88
26	46
27	21
28	2
29	1
30	69
31	203
32	247
33	176
34	68
35	28
36	2
37	1
38	146
39	486
40	693
41	558
42	311
43	94
44	36
45	2
46	1
47	312
48	1163
49	1882
50	1786
51	1083
52	507
53	124
54	45
55	2
56	1
57	673
58	2776
59	5052
60	5410
61	3898
62	1900
63	780
64	158
65	55
66	2
67	1

[1, 1, 1, 2, 2, 1, 4, 6, 2, 1, 8, 14, 10, 2, 1, 16, 35, 28, 15, 2, 1, 33, 84, 88, 46, 21, 2, 1, 69, 203, 247, 176, 68, 28, 2, 1, 146, 486, 693, 558, 311, 94, 36, 2, 1, 312, 1163, 1882, 1786, 1083, 507, 124, 45, 2, 1, 673, 2776, 5052, 5410, 3898, 1900, 780, 158, 55, 2, 1]

cp's OEIS Frontend

A273903 Triangle read by rows: T(n,k) is the number of bargraphs of semiperimeter n having k even-length columns (n>=2,k>=0).

Table of values

List of values