A140070 - cp's OEIS frontend

A140070 Triangle read by rows, iterates of matrix X * [1,0,0,0,...], where X = an infinite lower bidiagonal matrix with [1,3,1,3,1,3,...] in the main diagonal and [1,1,1,...] in the subdiagonal.

n	a(n)
1	1
2	1
3	1
4	1
5	4
6	1
7	1
8	13
9	5
10	1
11	1
12	40
13	18
14	8
15	1
16	1
17	121
18	58
19	42
20	9
21	1
22	1
23	364
24	179
25	184
26	51
27	12
28	1
29	1
30	1093
31	543
32	731
33	235
34	87
35	13
36	1
37	1
38	3280
39	1636
40	2736
41	966
42	496
43	100
44	16
45	1
46	1
47	9841
48	4916
49	9844
50	3702
51	2454
52	596
53	148
54	17
55	1
56	1
57	29524
58	14757
59	34448
60	13546
61	11064
62	3050
63	1040
64	165
65	20
66	1

[1, 1, 1, 1, 4, 1, 1, 13, 5, 1, 1, 40, 18, 8, 1, 1, 121, 58, 42, 9, 1, 1, 364, 179, 184, 51, 12, 1, 1, 1093, 543, 731, 235, 87, 13, 1, 1, 3280, 1636, 2736, 966, 496, 100, 16, 1, 1, 9841, 4916, 9844, 3702, 2454, 596, 148, 17, 1, 1, 29524, 14757, 34448, 13546, 11064, 3050, 1040, 165, 20, 1]

cp's OEIS Frontend

A140070 Triangle read by rows, iterates of matrix X * [1,0,0,0,...], where X = an infinite lower bidiagonal matrix with [1,3,1,3,1,3,...] in the main diagonal and [1,1,1,...] in the subdiagonal.

Table of values

List of values