A215404 - cp's OEIS frontend

A215404 a(n) = 4a(n-1) - 3a(n-2) - a(n-3), with a(0)=0, a(1)=0 and a(2)=1.

n	a(n)
0	0
1	0
2	1
3	4
4	13
5	39
6	113
7	322
8	910
9	2561
10	7192
11	20175
12	56563
13	158535
14	444276
15	1244936
16	3488381
17	9774440
18	27387681
19	76739023
20	215018609
21	602469686
22	1688083894
23	4729907909
24	13252910268
25	37133833451
26	104046695091
27	291532369743
28	816855560248
29	2288778436672
30	6413014696201

[0, 0, 1, 4, 13, 39, 113, 322, 910, 2561, 7192, 20175, 56563, 158535, 444276, 1244936, 3488381, 9774440, 27387681, 76739023, 215018609, 602469686, 1688083894, 4729907909, 13252910268, 37133833451, 104046695091, 291532369743, 816855560248, 2288778436672, 6413014696201]

cp's OEIS Frontend

A215404 a(n) = 4a(n-1) - 3a(n-2) - a(n-3), with a(0)=0, a(1)=0 and a(2)=1.

Table of values

List of values

cp's OEIS Frontend

A215404 a(n) = 4*a(n-1) - 3*a(n-2) - a(n-3), with a(0)=0, a(1)=0 and a(2)=1.

Table of values

List of values

A215404 a(n) = 4a(n-1) - 3a(n-2) - a(n-3), with a(0)=0, a(1)=0 and a(2)=1.