A003583 - cp's OEIS frontend

A003583 a(n) = (n+2)2^(2n-1) - (n/2)binomial(2n,n).

n	a(n)
0	1
1	5
2	26
3	130
4	628
5	2954
6	13612
7	61716
8	276200
9	1223002
10	5367676
11	23383100
12	101215576
13	435712580
14	1866667448
15	7963424104
16	33846062544
17	143373104378
18	605518549660
19	2550438016812
20	10716162617336

[1, 5, 26, 130, 628, 2954, 13612, 61716, 276200, 1223002, 5367676, 23383100, 101215576, 435712580, 1866667448, 7963424104, 33846062544, 143373104378, 605518549660, 2550438016812, 10716162617336]

cp's OEIS Frontend

A003583 a(n) = (n+2)2^(2n-1) - (n/2)binomial(2n,n).

Table of values

List of values

cp's OEIS Frontend

A003583 a(n) = (n+2)*2^(2*n-1) - (n/2)*binomial(2*n,n).

Table of values

List of values

A003583 a(n) = (n+2)2^(2n-1) - (n/2)binomial(2n,n).