A132081 - cp's OEIS frontend

A132081 Triangle (read by rows) with row sums = Motzkin sums (also called Riordan numbers) (A005043): T(n,s) = (1/n)C(n,s)(C(n-s,s+1) - C(n-s-2,s-1)).

n	a(n)
3	1
4	1
5	2
6	1
7	5
8	1
9	9
10	5
11	1
12	14
13	21
14	1
15	20
16	56
17	14
18	1
19	27
20	120
21	84
22	1
23	35
24	225
25	300
26	42
27	1
28	44
29	385
30	825
31	330
32	1
33	54
34	616
35	1925
36	1485
37	132
38	1
39	65
40	936
41	4004
42	5005
43	1287
44	1
45	77
46	1365
47	7644
48	14014
49	7007
50	429

[1, 1, 2, 1, 5, 1, 9, 5, 1, 14, 21, 1, 20, 56, 14, 1, 27, 120, 84, 1, 35, 225, 300, 42, 1, 44, 385, 825, 330, 1, 54, 616, 1925, 1485, 132, 1, 65, 936, 4004, 5005, 1287, 1, 77, 1365, 7644, 14014, 7007, 429]

cp's OEIS Frontend

A132081 Triangle (read by rows) with row sums = Motzkin sums (also called Riordan numbers) (A005043): T(n,s) = (1/n)C(n,s)(C(n-s,s+1) - C(n-s-2,s-1)).

Table of values

List of values

cp's OEIS Frontend

A132081 Triangle (read by rows) with row sums = Motzkin sums (also called Riordan numbers) (A005043): T(n,s) = (1/n)*C(n,s)*(C(n-s,s+1) - C(n-s-2,s-1)).

Table of values

List of values

A132081 Triangle (read by rows) with row sums = Motzkin sums (also called Riordan numbers) (A005043): T(n,s) = (1/n)C(n,s)(C(n-s,s+1) - C(n-s-2,s-1)).