A118929 - cp's OEIS frontend

A118929 a(n) = Sum_{k=0..[n/2]} 2^(n-2k-1)C(n-1,2k)C(2k,k)/(k+1)a(k), with a(0)=1.

n	a(n)
0	1
1	1
2	2
3	5
4	14
5	44
6	152
7	569
8	2270
9	9524
10	41576
11	187432
12	868144
13	4117216
14	19945408
15	98523013
16	495521686
17	2534420852
18	13167361256
19	69417635240
20	370991119792
21	2008036459744
22	10997771773888
23	60896581502800
24	340633178891872

[1, 1, 2, 5, 14, 44, 152, 569, 2270, 9524, 41576, 187432, 868144, 4117216, 19945408, 98523013, 495521686, 2534420852, 13167361256, 69417635240, 370991119792, 2008036459744, 10997771773888, 60896581502800, 340633178891872]

cp's OEIS Frontend

A118929 a(n) = Sum_{k=0..[n/2]} 2^(n-2k-1)C(n-1,2k)C(2k,k)/(k+1)a(k), with a(0)=1.

Table of values

List of values

cp's OEIS Frontend

A118929 a(n) = Sum_{k=0..[n/2]} 2^(n-2*k-1)*C(n-1,2*k)*C(2*k,k)/(k+1)*a(k), with a(0)=1.

Table of values

List of values

A118929 a(n) = Sum_{k=0..[n/2]} 2^(n-2k-1)C(n-1,2k)C(2k,k)/(k+1)a(k), with a(0)=1.