A360212 - cp's OEIS frontend

A360212 a(n) = Sum_{k=0..floor(n/3)} (-1)^k * binomial(2n-5k,n-3*k).

n	a(n)
0	1
1	2
2	6
3	19
4	67
5	242
6	890
7	3310
8	12423
9	46959
10	178526
11	681893
12	2614698
13	10059000
14	38807021
15	150080294
16	581649776
17	2258469988
18	8783966719
19	34214789901
20	133450049457
21	521134066663
22	2037313708685
23	7972641631438
24	31228124666374
25	122421230120657

[1, 2, 6, 19, 67, 242, 890, 3310, 12423, 46959, 178526, 681893, 2614698, 10059000, 38807021, 150080294, 581649776, 2258469988, 8783966719, 34214789901, 133450049457, 521134066663, 2037313708685, 7972641631438, 31228124666374, 122421230120657]

cp's OEIS Frontend

A360212 a(n) = Sum_{k=0..floor(n/3)} (-1)^k * binomial(2n-5k,n-3*k).

Table of values

List of values

cp's OEIS Frontend

A360212 a(n) = Sum_{k=0..floor(n/3)} (-1)^k * binomial(2*n-5*k,n-3*k).

Table of values

List of values

A360212 a(n) = Sum_{k=0..floor(n/3)} (-1)^k * binomial(2n-5k,n-3*k).