A317051 - cp's OEIS frontend

A317051 Triangle read by rows: T(0,0) = 1; T(n,k) = T(n-1,k) + 9 * T(n-2,k-1) for k = 0..floor(n/2); T(n,k)=0 for n or k < 0.

n	a(n)
0	1
1	1
2	1
3	9
4	1
5	18
6	1
7	27
8	81
9	1
10	36
11	243
12	1
13	45
14	486
15	729
16	1
17	54
18	810
19	2916
20	1
21	63
22	1215
23	7290
24	6561
25	1
26	72
27	1701
28	14580
29	32805
30	1
31	81
32	2268
33	25515
34	98415
35	59049
36	1
37	90
38	2916
39	40824
40	229635
41	354294
42	1
43	99
44	3645
45	61236
46	459270
47	1240029
48	531441
49	1
50	108
51	4455
52	87480
53	826686
54	3306744
55	3720087

[1, 1, 1, 9, 1, 18, 1, 27, 81, 1, 36, 243, 1, 45, 486, 729, 1, 54, 810, 2916, 1, 63, 1215, 7290, 6561, 1, 72, 1701, 14580, 32805, 1, 81, 2268, 25515, 98415, 59049, 1, 90, 2916, 40824, 229635, 354294, 1, 99, 3645, 61236, 459270, 1240029, 531441, 1, 108, 4455, 87480, 826686, 3306744, 3720087]

cp's OEIS Frontend

A317051 Triangle read by rows: T(0,0) = 1; T(n,k) = T(n-1,k) + 9 * T(n-2,k-1) for k = 0..floor(n/2); T(n,k)=0 for n or k < 0.

Table of values

List of values