A138778 - cp's OEIS frontend

A138778 Triangle read by rows: T(n,k)=k*binomial(n-2k,3k) (n>=5, 1<=k<=n/5).

n	a(n)
5	1
6	4
7	10
8	20
9	35
10	56
11	2
12	84
13	14
14	120
15	56
16	165
17	168
18	220
19	420
20	286
21	924
22	3
23	364
24	1848
25	30
26	455
27	3432
28	165
29	560
30	6006
31	660
32	680
33	10010
34	2145
35	816
36	16016
37	6006
38	4
39	969
40	24752
41	15015
42	52
43	1140
44	37128
45	34320
46	364

[1, 4, 10, 20, 35, 56, 2, 84, 14, 120, 56, 165, 168, 220, 420, 286, 924, 3, 364, 1848, 30, 455, 3432, 165, 560, 6006, 660, 680, 10010, 2145, 816, 16016, 6006, 4, 969, 24752, 15015, 52, 1140, 37128, 34320, 364]

cp's OEIS Frontend

A138778 Triangle read by rows: T(n,k)=k*binomial(n-2k,3k) (n>=5, 1<=k<=n/5).

Table of values

List of values