A002739 - cp's OEIS frontend

A002739 a(n) = ((2n-1)!/(2n!(n-2)!))((n^3-3n^2+2n+2)/(n^2-1)).

n	a(n)
2	1
3	10
4	91
5	651
6	4026
7	22737
8	120835
9	615043
10	3031678
11	14578928
12	68747966
13	319075550
14	1461581460
15	6621579135
16	29718121635
17	132302508195
18	584868588150
19	2569600678260
20	11227927978410
21	48822435838410
22	211370463290220
23	911509393468050
24	3916793943349326
25	16776146058210126
26	71641860657928876

[1, 10, 91, 651, 4026, 22737, 120835, 615043, 3031678, 14578928, 68747966, 319075550, 1461581460, 6621579135, 29718121635, 132302508195, 584868588150, 2569600678260, 11227927978410, 48822435838410, 211370463290220, 911509393468050, 3916793943349326, 16776146058210126, 71641860657928876]

cp's OEIS Frontend

A002739 a(n) = ((2n-1)!/(2n!(n-2)!))((n^3-3n^2+2n+2)/(n^2-1)).

Table of values

List of values

cp's OEIS Frontend

A002739 a(n) = ((2*n-1)!/(2*n!*(n-2)!))*((n^3-3*n^2+2*n+2)/(n^2-1)).

Table of values

List of values

A002739 a(n) = ((2n-1)!/(2n!(n-2)!))((n^3-3n^2+2n+2)/(n^2-1)).