A360290 - cp's OEIS frontend

A360290 a(n) = Sum_{k=0..floor(n/2)} binomial(n-1-k,k) * binomial(2n-4k,n-2*k).

n	a(n)
0	1
1	2
2	6
3	22
4	82
5	314
6	1222
7	4814
8	19138
9	76626
10	308550
11	1248230
12	5069266
13	20654602
14	84392838
15	345659166
16	1418769154
17	5834283298
18	24031706246
19	99134911542
20	409495076050
21	1693539077210
22	7011618614342
23	29058701620974
24	120540377731266
25	500443750830962

[1, 2, 6, 22, 82, 314, 1222, 4814, 19138, 76626, 308550, 1248230, 5069266, 20654602, 84392838, 345659166, 1418769154, 5834283298, 24031706246, 99134911542, 409495076050, 1693539077210, 7011618614342, 29058701620974, 120540377731266, 500443750830962]

cp's OEIS Frontend

A360290 a(n) = Sum_{k=0..floor(n/2)} binomial(n-1-k,k) * binomial(2n-4k,n-2*k).

Table of values

List of values

cp's OEIS Frontend

A360290 a(n) = Sum_{k=0..floor(n/2)} binomial(n-1-k,k) * binomial(2*n-4*k,n-2*k).

Table of values

List of values

A360290 a(n) = Sum_{k=0..floor(n/2)} binomial(n-1-k,k) * binomial(2n-4k,n-2*k).