A383584 - cp's OEIS frontend

A383584 a(n) = Sum_{k=0..floor(n/4)} binomial(n-3k-1,k) binomial(k,n-4*k).

n	a(n)
0	1
1	0
2	0
3	0
4	0
5	1
6	0
7	0
8	0
9	2
10	3
11	0
12	0
13	3
14	12
15	10
16	0
17	4
18	30
19	60
20	35
21	5
22	60
23	210
24	280
25	132
26	105
27	560
28	1260
29	1267
30	630
31	1260
32	4200
33	6938
34	5796
35	4236
36	11550
37	27729
38	36396
39	28644
40	34155
41	90100
42	168663
43	188100
44	163020
45	276573
46	631290
47	973830
48	995280
49	1068222
50	2111252
51	4104100

[1, 0, 0, 0, 0, 1, 0, 0, 0, 2, 3, 0, 0, 3, 12, 10, 0, 4, 30, 60, 35, 5, 60, 210, 280, 132, 105, 560, 1260, 1267, 630, 1260, 4200, 6938, 5796, 4236, 11550, 27729, 36396, 28644, 34155, 90100, 168663, 188100, 163020, 276573, 631290, 973830, 995280, 1068222, 2111252, 4104100]

cp's OEIS Frontend

A383584 a(n) = Sum_{k=0..floor(n/4)} binomial(n-3k-1,k) binomial(k,n-4*k).

Table of values

List of values

cp's OEIS Frontend

A383584 a(n) = Sum_{k=0..floor(n/4)} binomial(n-3*k-1,k) * binomial(k,n-4*k).

Table of values

List of values

A383584 a(n) = Sum_{k=0..floor(n/4)} binomial(n-3k-1,k) binomial(k,n-4*k).