A192237 - cp's OEIS frontend

A192237 a(n) = 2*(a(n-1) + a(n-2) + a(n-3)) - a(n-4) for n >= 4, with initial terms 0,0,0,1.

n	a(n)
0	0
1	0
2	0
3	1
4	2
5	6
6	18
7	51
8	148
9	428
10	1236
11	3573
12	10326
13	29842
14	86246
15	249255
16	720360
17	2081880
18	6016744
19	17388713
20	50254314
21	145237662
22	419744634
23	1213084507
24	3505879292
25	10132179204
26	29282541372
27	84628115229
28	244579792318
29	706848718634
30	2042830710990
31	5903890328655
32	17062559724240
33	49311712809136
34	142513495013072

[0, 0, 0, 1, 2, 6, 18, 51, 148, 428, 1236, 3573, 10326, 29842, 86246, 249255, 720360, 2081880, 6016744, 17388713, 50254314, 145237662, 419744634, 1213084507, 3505879292, 10132179204, 29282541372, 84628115229, 244579792318, 706848718634, 2042830710990, 5903890328655, 17062559724240, 49311712809136, 142513495013072]

cp's OEIS Frontend

A192237 a(n) = 2*(a(n-1) + a(n-2) + a(n-3)) - a(n-4) for n >= 4, with initial terms 0,0,0,1.

Table of values

List of values