A257620 - cp's OEIS frontend

A257620 Triangle read by rows: T(n, k) = t(n-k, k), where t(0,0) = 1, t(n,m) = 0 if n < 0 or m < 0, else t(n,m) = f(m)t(n-1,m) + f(n)t(n,m-1), and f(n) = 3*n + 3.

n	a(n)
0	1
1	3
2	3
3	9
4	36
5	9
6	27
7	297
8	297
9	27
10	81
11	2106
12	5346
13	2106
14	81
15	243
16	13851
17	73386
18	73386
19	13851
20	243
21	729
22	87480
23	868239
24	1761264
25	868239
26	87480
27	729
28	2187
29	540189
30	9388791
31	34158753
32	34158753
33	9388791
34	540189
35	2187
36	6561
37	3293622
38	95843088
39	578903274
40	1024762590
41	578903274
42	95843088
43	3293622
44	6561

[1, 3, 3, 9, 36, 9, 27, 297, 297, 27, 81, 2106, 5346, 2106, 81, 243, 13851, 73386, 73386, 13851, 243, 729, 87480, 868239, 1761264, 868239, 87480, 729, 2187, 540189, 9388791, 34158753, 34158753, 9388791, 540189, 2187, 6561, 3293622, 95843088, 578903274, 1024762590, 578903274, 95843088, 3293622, 6561]

cp's OEIS Frontend

A257620 Triangle read by rows: T(n, k) = t(n-k, k), where t(0,0) = 1, t(n,m) = 0 if n < 0 or m < 0, else t(n,m) = f(m)t(n-1,m) + f(n)t(n,m-1), and f(n) = 3*n + 3.

Table of values

List of values

cp's OEIS Frontend

A257620 Triangle read by rows: T(n, k) = t(n-k, k), where t(0,0) = 1, t(n,m) = 0 if n < 0 or m < 0, else t(n,m) = f(m)*t(n-1,m) + f(n)*t(n,m-1), and f(n) = 3*n + 3.

Table of values

List of values

A257620 Triangle read by rows: T(n, k) = t(n-k, k), where t(0,0) = 1, t(n,m) = 0 if n < 0 or m < 0, else t(n,m) = f(m)t(n-1,m) + f(n)t(n,m-1), and f(n) = 3*n + 3.