A382225 - cp's OEIS frontend

A382225 Triangle read by rows: T(n,k) = Sum_{i=k..n} C(i-1,i-k)*C(i,k).

n	a(n)
0	1
1	1
2	1
3	1
4	3
5	1
6	1
7	6
8	7
9	1
10	1
11	10
12	25
13	13
14	1
15	1
16	15
17	65
18	73
19	21
20	1
21	1
22	21
23	140
24	273
25	171
26	31
27	1
28	1
29	28
30	266
31	798
32	871
33	346
34	43
35	1
36	1
37	36
38	462
39	1974
40	3321
41	2306
42	631
43	57
44	1
45	1
46	45
47	750
48	4326
49	10377
50	11126
51	5335
52	1065
53	73
54	1
55	1
56	55
57	1155
58	8646
59	28017
60	42878
61	31795
62	11145
63	1693
64	91
65	1

[1, 1, 1, 1, 3, 1, 1, 6, 7, 1, 1, 10, 25, 13, 1, 1, 15, 65, 73, 21, 1, 1, 21, 140, 273, 171, 31, 1, 1, 28, 266, 798, 871, 346, 43, 1, 1, 36, 462, 1974, 3321, 2306, 631, 57, 1, 1, 45, 750, 4326, 10377, 11126, 5335, 1065, 73, 1, 1, 55, 1155, 8646, 28017, 42878, 31795, 11145, 1693, 91, 1]

cp's OEIS Frontend

A382225 Triangle read by rows: T(n,k) = Sum_{i=k..n} C(i-1,i-k)*C(i,k).

Table of values

List of values