A125501 - cp's OEIS frontend

A125501 The (1,1)-entry in the matrix M^n, where M is the 7 X 7 Cartan matrix [2,-1,0,0,0,0,0; -1,2,-1,0,0,0,0; 0,-1,2,-1,0,0,-1; 0,0,-1,2,-1,0,0; 0,0,0,-1,2,-1,0; 0,0,0,0,-1,2,0; 0,0,-1,0,0,0,2].

n	a(n)
0	1
1	2
2	5
3	14
4	42
5	132
6	430
7	1444
8	4981
9	17594
10	63442
11	232828
12	867145
13	3269034
14	12446307
15	47767466
16	184508963
17	716386598
18	2793067210
19	10926148172
20	42857189054
21	168471757292
22	663434825367
23	2616336659586
24	10329939578230

[1, 2, 5, 14, 42, 132, 430, 1444, 4981, 17594, 63442, 232828, 867145, 3269034, 12446307, 47767466, 184508963, 716386598, 2793067210, 10926148172, 42857189054, 168471757292, 663434825367, 2616336659586, 10329939578230]

cp's OEIS Frontend

A125501 The (1,1)-entry in the matrix M^n, where M is the 7 X 7 Cartan matrix [2,-1,0,0,0,0,0; -1,2,-1,0,0,0,0; 0,-1,2,-1,0,0,-1; 0,0,-1,2,-1,0,0; 0,0,0,-1,2,-1,0; 0,0,0,0,-1,2,0; 0,0,-1,0,0,0,2].

Table of values

List of values