A138776 - cp's OEIS frontend

A138776 Triangle read by rows: T(n,k)=binomial(n-2k,3k+1) (n>=1, 0<=k<=(n-1)/5).

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	1
8	7
9	5
10	8
11	15
12	9
13	35
14	10
15	70
16	11
17	126
18	1
19	12
20	210
21	8
22	13
23	330
24	36
25	14
26	495
27	120
28	15
29	715
30	330
31	16
32	1001
33	792
34	1
35	17
36	1365
37	1716
38	11
39	18
40	1820
41	3432
42	66
43	19
44	2380
45	6435
46	286
47	20
48	3060
49	11440
50	1001

[1, 2, 3, 4, 5, 6, 1, 7, 5, 8, 15, 9, 35, 10, 70, 11, 126, 1, 12, 210, 8, 13, 330, 36, 14, 495, 120, 15, 715, 330, 16, 1001, 792, 1, 17, 1365, 1716, 11, 18, 1820, 3432, 66, 19, 2380, 6435, 286, 20, 3060, 11440, 1001]

cp's OEIS Frontend

A138776 Triangle read by rows: T(n,k)=binomial(n-2k,3k+1) (n>=1, 0<=k<=(n-1)/5).

Table of values

List of values