A144470 - cp's OEIS frontend

A144470 Triangle t(n,m) read by rows: t(n,m) = binomial(n,m)*3^m if m <= n/2, else t(n,m) = t(n,n-m).

n	a(n)
0	1
1	1
2	1
3	1
4	6
5	1
6	1
7	9
8	9
9	1
10	1
11	12
12	54
13	12
14	1
15	1
16	15
17	90
18	90
19	15
20	1
21	1
22	18
23	135
24	540
25	135
26	18
27	1
28	1
29	21
30	189
31	945
32	945
33	189
34	21
35	1
36	1
37	24
38	252
39	1512
40	5670
41	1512
42	252
43	24
44	1
45	1
46	27
47	324
48	2268
49	10206
50	10206
51	2268
52	324
53	27
54	1
55	1
56	30
57	405
58	3240
59	17010
60	61236
61	17010
62	3240

[1, 1, 1, 1, 6, 1, 1, 9, 9, 1, 1, 12, 54, 12, 1, 1, 15, 90, 90, 15, 1, 1, 18, 135, 540, 135, 18, 1, 1, 21, 189, 945, 945, 189, 21, 1, 1, 24, 252, 1512, 5670, 1512, 252, 24, 1, 1, 27, 324, 2268, 10206, 10206, 2268, 324, 27, 1, 1, 30, 405, 3240, 17010, 61236, 17010, 3240]

cp's OEIS Frontend

A144470 Triangle t(n,m) read by rows: t(n,m) = binomial(n,m)*3^m if m <= n/2, else t(n,m) = t(n,n-m).

Table of values

List of values