A144438 - cp's OEIS frontend

A144438 Triangle T(n,k) by rows: T(n, k) = (n-k+1)T(n-1, k-1) + kT(n-1, k) + T(n-2, k-1) with T(n, 1) = T(n, n) = 1.

n	a(n)
1	1
2	1
3	1
4	1
5	5
6	1
7	1
8	14
9	14
10	1
11	1
12	33
13	89
14	33
15	1
16	1
17	72
18	413
19	413
20	72
21	1
22	1
23	151
24	1632
25	3393
26	1632
27	151
28	1
29	1
30	310
31	5874
32	22145
33	22145
34	5874
35	310
36	1
37	1
38	629
39	19943
40	125456
41	224843
42	125456
43	19943
44	629
45	1
46	1
47	1268
48	65171
49	647299
50	1899096
51	1899096
52	647299
53	65171
54	1268
55	1

[1, 1, 1, 1, 5, 1, 1, 14, 14, 1, 1, 33, 89, 33, 1, 1, 72, 413, 413, 72, 1, 1, 151, 1632, 3393, 1632, 151, 1, 1, 310, 5874, 22145, 22145, 5874, 310, 1, 1, 629, 19943, 125456, 224843, 125456, 19943, 629, 1, 1, 1268, 65171, 647299, 1899096, 1899096, 647299, 65171, 1268, 1]

cp's OEIS Frontend

A144438 Triangle T(n,k) by rows: T(n, k) = (n-k+1)T(n-1, k-1) + kT(n-1, k) + T(n-2, k-1) with T(n, 1) = T(n, n) = 1.

Table of values

List of values

cp's OEIS Frontend

A144438 Triangle T(n,k) by rows: T(n, k) = (n-k+1)*T(n-1, k-1) + k*T(n-1, k) + T(n-2, k-1) with T(n, 1) = T(n, n) = 1.

Table of values

List of values

A144438 Triangle T(n,k) by rows: T(n, k) = (n-k+1)T(n-1, k-1) + kT(n-1, k) + T(n-2, k-1) with T(n, 1) = T(n, n) = 1.