A360151 - cp's OEIS frontend

A360151 a(n) = Sum_{k=0..floor(n/3)} binomial(2n-4k,n-3*k).

n	a(n)
0	1
1	2
2	6
3	21
4	74
5	267
6	981
7	3648
8	13690
9	51744
10	196699
11	751237
12	2880345
13	11080081
14	42743148
15	165291569
16	640563158
17	2487083484
18	9672626600
19	37674470433
20	146937686295
21	573781535775
22	2243050091905
23	8777451670102
24	34379401083017
25	134770951530840

[1, 2, 6, 21, 74, 267, 981, 3648, 13690, 51744, 196699, 751237, 2880345, 11080081, 42743148, 165291569, 640563158, 2487083484, 9672626600, 37674470433, 146937686295, 573781535775, 2243050091905, 8777451670102, 34379401083017, 134770951530840]

cp's OEIS Frontend

A360151 a(n) = Sum_{k=0..floor(n/3)} binomial(2n-4k,n-3*k).

Table of values

List of values

cp's OEIS Frontend

A360151 a(n) = Sum_{k=0..floor(n/3)} binomial(2*n-4*k,n-3*k).

Table of values

List of values

A360151 a(n) = Sum_{k=0..floor(n/3)} binomial(2n-4k,n-3*k).