A123942 - cp's OEIS frontend

A123942 The (1,4)-entry in the 4 X 4 matrix M^n, where M={{3, 2, 1, 1}, {2, 1, 1, 0}, {1, 1, 0, 0}, {1, 0, 0, 0}} (n>=0).

n	a(n)
0	0
1	1
2	3
3	15
4	71
5	340
6	1626
7	7778
8	37205
9	177966
10	851280
11	4072001
12	19477953
13	93170570
14	445670811
15	2131815570
16	10197297001
17	48777608903
18	233322137235
19	1116069871981
20	5338593130960
21	25536552265626
22	122151189577128
23	584296304368075
24	2794914830384226

[0, 1, 3, 15, 71, 340, 1626, 7778, 37205, 177966, 851280, 4072001, 19477953, 93170570, 445670811, 2131815570, 10197297001, 48777608903, 233322137235, 1116069871981, 5338593130960, 25536552265626, 122151189577128, 584296304368075, 2794914830384226]

cp's OEIS Frontend

A123942 The (1,4)-entry in the 4 X 4 matrix M^n, where M={{3, 2, 1, 1}, {2, 1, 1, 0}, {1, 1, 0, 0}, {1, 0, 0, 0}} (n>=0).

Table of values

List of values