A360150 - cp's OEIS frontend

A360150 a(n) = Sum_{k=0..floor(n/3)} binomial(2n-k,n-3k).

n	a(n)
0	1
1	2
2	6
3	21
4	77
5	288
6	1090
7	4159
8	15964
9	61557
10	238221
11	924597
12	3597290
13	14024341
14	54770176
15	214218966
16	838959762
17	3289471537
18	12910910288
19	50720828034
20	199422778415
21	784672001097
22	3089564308849
23	12172411084432
24	47984843655991
25	189260578353602

[1, 2, 6, 21, 77, 288, 1090, 4159, 15964, 61557, 238221, 924597, 3597290, 14024341, 54770176, 214218966, 838959762, 3289471537, 12910910288, 50720828034, 199422778415, 784672001097, 3089564308849, 12172411084432, 47984843655991, 189260578353602]

cp's OEIS Frontend

A360150 a(n) = Sum_{k=0..floor(n/3)} binomial(2n-k,n-3k).

Table of values

List of values

cp's OEIS Frontend

A360150 a(n) = Sum_{k=0..floor(n/3)} binomial(2*n-k,n-3*k).

Table of values

List of values

A360150 a(n) = Sum_{k=0..floor(n/3)} binomial(2n-k,n-3k).