A123220 - cp's OEIS frontend

A123220 a(n)=the (1,1)-term of M^(n-1), where M=matrix(5,5, [3,-1,-1,-1,-1; 1,3,-1,-1,-1; 1,1,3,-1,-1; 1,1,1,3,-1; 1,1,1,1,3]).

n	a(n)
1	1
2	3
3	5
4	-9
5	-99
6	-297
7	389
8	8655
9	46573
10	122823
11	-120491
12	-3003393
13	-15885315
14	-40246281
15	50400229
16	1040606127
17	5296630541
18	12512952615
19	-22872751243
20	-368600380833
21	-1789336379619
22	-3926384911017
23	9502037022725
24	129579396089871
25	602116408170541
26	1219711972804743

[1, 3, 5, -9, -99, -297, 389, 8655, 46573, 122823, -120491, -3003393, -15885315, -40246281, 50400229, 1040606127, 5296630541, 12512952615, -22872751243, -368600380833, -1789336379619, -3926384911017, 9502037022725, 129579396089871, 602116408170541, 1219711972804743]

cp's OEIS Frontend

A123220 a(n)=the (1,1)-term of M^(n-1), where M=matrix(5,5, [3,-1,-1,-1,-1; 1,3,-1,-1,-1; 1,1,3,-1,-1; 1,1,1,3,-1; 1,1,1,1,3]).

Table of values

List of values