A383583 - cp's OEIS frontend

A383583 a(n) = Sum_{k=0..floor(n/3)} binomial(n-2k-1,k) binomial(k,n-3*k).

n	a(n)
0	1
1	0
2	0
3	0
4	1
5	0
6	0
7	2
8	3
9	0
10	3
11	12
12	10
13	4
14	30
15	60
16	40
17	60
18	210
19	286
20	231
21	560
22	1267
23	1428
24	1722
25	4208
26	7182
27	8064
28	13275
29	28080
30	40656
31	51754
32	97020
33	176088
34	240251
35	355872
36	667810
37	1081092
38	1506648
39	2475616
40	4401696
41	6693492
42	9904752
43	16950662
44	28359201

[1, 0, 0, 0, 1, 0, 0, 2, 3, 0, 3, 12, 10, 4, 30, 60, 40, 60, 210, 286, 231, 560, 1267, 1428, 1722, 4208, 7182, 8064, 13275, 28080, 40656, 51754, 97020, 176088, 240251, 355872, 667810, 1081092, 1506648, 2475616, 4401696, 6693492, 9904752, 16950662, 28359201]

cp's OEIS Frontend

A383583 a(n) = Sum_{k=0..floor(n/3)} binomial(n-2k-1,k) binomial(k,n-3*k).

Table of values

List of values

cp's OEIS Frontend

A383583 a(n) = Sum_{k=0..floor(n/3)} binomial(n-2*k-1,k) * binomial(k,n-3*k).

Table of values

List of values

A383583 a(n) = Sum_{k=0..floor(n/3)} binomial(n-2k-1,k) binomial(k,n-3*k).