A257625 - cp's OEIS frontend

A257625 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) = 6*n + 3.

n	a(n)
0	1
1	3
2	3
3	9
4	54
5	9
6	27
7	621
8	621
9	27
10	81
11	6156
12	18630
13	6156
14	81
15	243
16	57591
17	408726
18	408726
19	57591
20	243
21	729
22	526338
23	7685847
24	17166492
25	7685847
26	526338
27	729
28	2187
29	4765473
30	132656859
31	568014201
32	568014201
33	132656859
34	4765473
35	2187

[1, 3, 3, 9, 54, 9, 27, 621, 621, 27, 81, 6156, 18630, 6156, 81, 243, 57591, 408726, 408726, 57591, 243, 729, 526338, 7685847, 17166492, 7685847, 526338, 729, 2187, 4765473, 132656859, 568014201, 568014201, 132656859, 4765473, 2187]

cp's OEIS Frontend

A257625 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) = 6*n + 3.

Table of values

List of values

cp's OEIS Frontend

A257625 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) = 6*n + 3.

Table of values

List of values

A257625 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) = 6*n + 3.