A027412 - cp's OEIS frontend

A027412 a(n) = 2a(n-1) + (n-2)a(n-2) with a(0) = 1, a(1) = 2.

n	a(n)
0	1
1	2
2	4
3	10
4	28
5	86
6	284
7	998
8	3700
9	14386
10	58372
11	246218
12	1076156
13	4860710
14	22635292
15	108459814
16	533813716
17	2694524642
18	13930068740
19	73667056394
20	398075350108
21	2195824771702
22	12353156545564
23	70818633296870

[1, 2, 4, 10, 28, 86, 284, 998, 3700, 14386, 58372, 246218, 1076156, 4860710, 22635292, 108459814, 533813716, 2694524642, 13930068740, 73667056394, 398075350108, 2195824771702, 12353156545564, 70818633296870]

cp's OEIS Frontend

A027412 a(n) = 2a(n-1) + (n-2)a(n-2) with a(0) = 1, a(1) = 2.

Table of values

List of values

cp's OEIS Frontend

A027412 a(n) = 2*a(n-1) + (n-2)*a(n-2) with a(0) = 1, a(1) = 2.

Table of values

List of values

A027412 a(n) = 2a(n-1) + (n-2)a(n-2) with a(0) = 1, a(1) = 2.