A085573 - cp's OEIS frontend

A085573 2Sum(floor(C(n,w)/w),w=1..n/2-1)+floor(C(n,n/2)/(n/2)) if n is even, otherwise 2Sum(floor(C(n,w)/w),w=1..(n-1)/2).

n	a(n)
2	2
3	6
4	11
5	20
6	32
7	56
8	97
9	172
10	298
11	534
12	952
13	1736
14	3150
15	5824
16	10724
17	20042
18	37308
19	70304
20	131971
21	250308
22	473020
23	901872
24	1713596
25	3281122
26	6262254
27	12033330
28	23053047
29	44431308
30	85393280
31	165008114
32	318009610
33	615878180
34	1189803926
35	2308781688

[2, 6, 11, 20, 32, 56, 97, 172, 298, 534, 952, 1736, 3150, 5824, 10724, 20042, 37308, 70304, 131971, 250308, 473020, 901872, 1713596, 3281122, 6262254, 12033330, 23053047, 44431308, 85393280, 165008114, 318009610, 615878180, 1189803926, 2308781688]

cp's OEIS Frontend

A085573 2Sum(floor(C(n,w)/w),w=1..n/2-1)+floor(C(n,n/2)/(n/2)) if n is even, otherwise 2Sum(floor(C(n,w)/w),w=1..(n-1)/2).

Table of values

List of values

cp's OEIS Frontend

A085573 2*Sum(floor(C(n,w)/w),w=1..n/2-1)+floor(C(n,n/2)/(n/2)) if n is even, otherwise 2*Sum(floor(C(n,w)/w),w=1..(n-1)/2).

Table of values

List of values

A085573 2Sum(floor(C(n,w)/w),w=1..n/2-1)+floor(C(n,n/2)/(n/2)) if n is even, otherwise 2Sum(floor(C(n,w)/w),w=1..(n-1)/2).