A085571 - cp's OEIS frontend

A085571 Numerator of 2Sum(C(n,w)/w,w=1..n/2-1)+C(n,n/2)/(n/2) if n is even otherwise of 2Sum(C(n,w)/w,w=1..(n-1)/2).

n	a(n)
2	2
3	6
4	11
5	20
6	101
7	175
8	593
9	173
10	1502
11	2684
12	28649
13	52169
14	662393
15	1224077
16	4506259
17	4210067
18	23506871
19	44294491
20	41572193
21	78849257
22	1639049932
23	3125022742
24	23750582143
25	9095291663
26	225666905951
27	144544431373
28	276913262539
29	76244134117
30	732674442397

[2, 6, 11, 20, 101, 175, 593, 173, 1502, 2684, 28649, 52169, 662393, 1224077, 4506259, 4210067, 23506871, 44294491, 41572193, 78849257, 1639049932, 3125022742, 23750582143, 9095291663, 225666905951, 144544431373, 276913262539, 76244134117, 732674442397]

cp's OEIS Frontend

A085571 Numerator of 2Sum(C(n,w)/w,w=1..n/2-1)+C(n,n/2)/(n/2) if n is even otherwise of 2Sum(C(n,w)/w,w=1..(n-1)/2).

Table of values

List of values

cp's OEIS Frontend

A085571 Numerator of 2*Sum(C(n,w)/w,w=1..n/2-1)+C(n,n/2)/(n/2) if n is even otherwise of 2*Sum(C(n,w)/w,w=1..(n-1)/2).

Table of values

List of values

A085571 Numerator of 2Sum(C(n,w)/w,w=1..n/2-1)+C(n,n/2)/(n/2) if n is even otherwise of 2Sum(C(n,w)/w,w=1..(n-1)/2).