A027319 - cp's OEIS frontend

A027319 a(n) = Sum_{k=0..m} (k+1) * A026082(n, k), where 0 <= k <= m, m=n for n=0,1,2,3; m=2n for n >= 4.

n	a(n)
0	1
1	3
2	8
3	20
4	120
5	432
6	1512
7	5184
8	17496
9	58320
10	192456
11	629856
12	2047032
13	6613488
14	21257640
15	68024448
16	216827928
17	688747536
18	2181033864
19	6887475360
20	21695547384
21	68186006064
22	213856109928
23	669462604992
24	2092070640600
25	6527260398672
26	20334926626632

[1, 3, 8, 20, 120, 432, 1512, 5184, 17496, 58320, 192456, 629856, 2047032, 6613488, 21257640, 68024448, 216827928, 688747536, 2181033864, 6887475360, 21695547384, 68186006064, 213856109928, 669462604992, 2092070640600, 6527260398672, 20334926626632]

cp's OEIS Frontend

A027319 a(n) = Sum_{k=0..m} (k+1) * A026082(n, k), where 0 <= k <= m, m=n for n=0,1,2,3; m=2n for n >= 4.

Table of values

List of values