A155179 - cp's OEIS frontend

A155179 a(n) = 4*a(n-1)+a(n-2), n>2; a(0)=1, a(1)=3, a(2)=12.

n	a(n)
0	1
1	3
2	12
3	51
4	216
5	915
6	3876
7	16419
8	69552
9	294627
10	1248060
11	5286867
12	22395528
13	94868979
14	401871444
15	1702354755
16	7211290464
17	30547516611
18	129401356908
19	548152944243
20	2322013133880
21	9836205479763
22	41666835052932
23	176503545691491
24	747681017818896
25	3167227616967075

[1, 3, 12, 51, 216, 915, 3876, 16419, 69552, 294627, 1248060, 5286867, 22395528, 94868979, 401871444, 1702354755, 7211290464, 30547516611, 129401356908, 548152944243, 2322013133880, 9836205479763, 41666835052932, 176503545691491, 747681017818896, 3167227616967075]

cp's OEIS Frontend

A155179 a(n) = 4*a(n-1)+a(n-2), n>2; a(0)=1, a(1)=3, a(2)=12.

Table of values

List of values