A187830 - cp's OEIS frontend

A187830 a(n)=2a(n-1)+(n+3)a(n-2)-(n+3)*a(n-3), a(0)=0, a(1)=0, a(2)=1.

n	a(n)
0	0
1	0
2	1
3	2
4	11
5	30
6	141
7	472
8	2165
9	8302
10	38613
11	163144
12	780953
13	3554402
14	17611557
15	85145196
16	437376337
17	2225425454
18	11847704869
19	63032490312
20	347377407169
21	1923189664970
22	10955002251365
23	62881123205556
24	369621186243777
25	2193173759204902
26	13281809346518213

[0, 0, 1, 2, 11, 30, 141, 472, 2165, 8302, 38613, 163144, 780953, 3554402, 17611557, 85145196, 437376337, 2225425454, 11847704869, 63032490312, 347377407169, 1923189664970, 10955002251365, 62881123205556, 369621186243777, 2193173759204902, 13281809346518213]

cp's OEIS Frontend

A187830 a(n)=2a(n-1)+(n+3)a(n-2)-(n+3)*a(n-3), a(0)=0, a(1)=0, a(2)=1.

Table of values

List of values

cp's OEIS Frontend

A187830 a(n)=2*a(n-1)+(n+3)*a(n-2)-(n+3)*a(n-3), a(0)=0, a(1)=0, a(2)=1.

Table of values

List of values

A187830 a(n)=2a(n-1)+(n+3)a(n-2)-(n+3)*a(n-3), a(0)=0, a(1)=0, a(2)=1.