A000898 - cp's OEIS frontend

A000898 a(n) = 2(a(n-1) + (n-1)a(n-2)) for n >= 2 with a(0) = 1.

n	a(n)
0	1
1	2
2	6
3	20
4	76
5	312
6	1384
7	6512
8	32400
9	168992
10	921184
11	5222208
12	30710464
13	186753920
14	1171979904
15	7573069568
16	50305536256
17	342949298688
18	2396286830080
19	17138748412928
20	125336396368896
21	936222729254912
22	7136574106003456
23	55466948299223040
24	439216305474605056
25	3540846129311916032

[1, 2, 6, 20, 76, 312, 1384, 6512, 32400, 168992, 921184, 5222208, 30710464, 186753920, 1171979904, 7573069568, 50305536256, 342949298688, 2396286830080, 17138748412928, 125336396368896, 936222729254912, 7136574106003456, 55466948299223040, 439216305474605056, 3540846129311916032]

cp's OEIS Frontend

A000898 a(n) = 2(a(n-1) + (n-1)a(n-2)) for n >= 2 with a(0) = 1.

Table of values

List of values

cp's OEIS Frontend

A000898 a(n) = 2*(a(n-1) + (n-1)*a(n-2)) for n >= 2 with a(0) = 1.

Table of values

List of values

A000898 a(n) = 2(a(n-1) + (n-1)a(n-2)) for n >= 2 with a(0) = 1.