A085568 - cp's OEIS frontend

A085568 Numerator of 2Sum(C(n,w)/(2w+1),w=0..n/2-1)+C(n,n/2)/(n+1) if n is even, or of 2Sum(C(n,w)/(2w+1),w=0..(n-1)/2) if n is odd.

n	a(n)
0	1
1	2
2	8
3	4
4	88
5	28
6	104
7	376
8	1904
9	372
10	30152
11	4952
12	193072
13	245848
14	64304
15	7984
16	8303392
17	32131172
18	126932136
19	164384184
20	185914544
21	16850280
22	3006076208
23	249890288
24	5554299808
25	21745428728
26	9598969456
27	37645191344
28	5687521456416
29	378608431568
30	4518712438048

[1, 2, 8, 4, 88, 28, 104, 376, 1904, 372, 30152, 4952, 193072, 245848, 64304, 7984, 8303392, 32131172, 126932136, 164384184, 185914544, 16850280, 3006076208, 249890288, 5554299808, 21745428728, 9598969456, 37645191344, 5687521456416, 378608431568, 4518712438048]

cp's OEIS Frontend

A085568 Numerator of 2Sum(C(n,w)/(2w+1),w=0..n/2-1)+C(n,n/2)/(n+1) if n is even, or of 2Sum(C(n,w)/(2w+1),w=0..(n-1)/2) if n is odd.

Table of values

List of values

cp's OEIS Frontend

A085568 Numerator of 2*Sum(C(n,w)/(2*w+1),w=0..n/2-1)+C(n,n/2)/(n+1) if n is even, or of 2*Sum(C(n,w)/(2*w+1),w=0..(n-1)/2) if n is odd.

Table of values

List of values

A085568 Numerator of 2Sum(C(n,w)/(2w+1),w=0..n/2-1)+C(n,n/2)/(n+1) if n is even, or of 2Sum(C(n,w)/(2w+1),w=0..(n-1)/2) if n is odd.