A033877 - cp's OEIS frontend

A033877 Triangular array read by rows associated with Schroeder numbers: T(1,k) = 1; T(n,k) = 0 if k < n; T(n,k) = T(n,k-1) + T(n-1,k-1) + T(n-1,k).

n	a(n)
1	1
2	1
3	2
4	1
5	4
6	6
7	1
8	6
9	16
10	22
11	1
12	8
13	30
14	68
15	90
16	1
17	10
18	48
19	146
20	304
21	394
22	1
23	12
24	70
25	264
26	714
27	1412
28	1806
29	1
30	14
31	96
32	430
33	1408
34	3534
35	6752
36	8558
37	1
38	16
39	126
40	652
41	2490
42	7432
43	17718
44	33028
45	41586
46	1
47	18
48	160
49	938
50	4080
51	14002
52	39152
53	89898
54	164512
55	206098

[1, 1, 2, 1, 4, 6, 1, 6, 16, 22, 1, 8, 30, 68, 90, 1, 10, 48, 146, 304, 394, 1, 12, 70, 264, 714, 1412, 1806, 1, 14, 96, 430, 1408, 3534, 6752, 8558, 1, 16, 126, 652, 2490, 7432, 17718, 33028, 41586, 1, 18, 160, 938, 4080, 14002, 39152, 89898, 164512, 206098]

cp's OEIS Frontend

A033877 Triangular array read by rows associated with Schroeder numbers: T(1,k) = 1; T(n,k) = 0 if k < n; T(n,k) = T(n,k-1) + T(n-1,k-1) + T(n-1,k).

Table of values

List of values