A138780 - cp's OEIS frontend

A138780 Triangle read by rows: T(n,k)=k*binomial(n-2k,3k+2) (n>=7, 1<=k<=(n-2)/5).

n	a(n)
7	1
8	6
9	21
10	56
11	126
12	252
13	2
14	462
15	18
16	792
17	90
18	1287
19	330
20	2002
21	990
22	3003
23	2574
24	3
25	4368
26	6006
27	36
28	6188
29	12870
30	234
31	8568
32	25740
33	1092
34	11628
35	48620
36	4095
37	15504
38	87516
39	13104
40	4
41	20349
42	151164
43	37128
44	60

[1, 6, 21, 56, 126, 252, 2, 462, 18, 792, 90, 1287, 330, 2002, 990, 3003, 2574, 3, 4368, 6006, 36, 6188, 12870, 234, 8568, 25740, 1092, 11628, 48620, 4095, 15504, 87516, 13104, 4, 20349, 151164, 37128, 60]

cp's OEIS Frontend

A138780 Triangle read by rows: T(n,k)=k*binomial(n-2k,3k+2) (n>=7, 1<=k<=(n-2)/5).

Table of values

List of values