A090017 - cp's OEIS frontend

A090017 a(n) = 4a(n-1) + 2a(n-2) for n>1, a(0)=0, a(1)=1.

n	a(n)
0	0
1	1
2	4
3	18
4	80
5	356
6	1584
7	7048
8	31360
9	139536
10	620864
11	2762528
12	12291840
13	54692416
14	243353344
15	1082798208
16	4817899520
17	21437194496
18	95384577024
19	424412697088
20	1888419942400
21	8402505163776
22	37386860539904
23	166352452487168

[0, 1, 4, 18, 80, 356, 1584, 7048, 31360, 139536, 620864, 2762528, 12291840, 54692416, 243353344, 1082798208, 4817899520, 21437194496, 95384577024, 424412697088, 1888419942400, 8402505163776, 37386860539904, 166352452487168]

cp's OEIS Frontend

A090017 a(n) = 4a(n-1) + 2a(n-2) for n>1, a(0)=0, a(1)=1.

Table of values

List of values

cp's OEIS Frontend

A090017 a(n) = 4*a(n-1) + 2*a(n-2) for n>1, a(0)=0, a(1)=1.

Table of values

List of values

A090017 a(n) = 4a(n-1) + 2a(n-2) for n>1, a(0)=0, a(1)=1.