A214831 - cp's OEIS frontend

A214831 a(n) = a(n-1) + a(n-2) + a(n-3), with a(0) = 1, a(1) = a(2) = 9.

n	a(n)
0	1
1	9
2	9
3	19
4	37
5	65
6	121
7	223
8	409
9	753
10	1385
11	2547
12	4685
13	8617
14	15849
15	29151
16	53617
17	98617
18	181385
19	333619
20	613621
21	1128625
22	2075865
23	3818111
24	7022601
25	12916577
26	23757289
27	43696467
28	80370333
29	147824089
30	271890889
31	500085311
32	919800289
33	1691776489

[1, 9, 9, 19, 37, 65, 121, 223, 409, 753, 1385, 2547, 4685, 8617, 15849, 29151, 53617, 98617, 181385, 333619, 613621, 1128625, 2075865, 3818111, 7022601, 12916577, 23757289, 43696467, 80370333, 147824089, 271890889, 500085311, 919800289, 1691776489]

cp's OEIS Frontend

A214831 a(n) = a(n-1) + a(n-2) + a(n-3), with a(0) = 1, a(1) = a(2) = 9.

Table of values

List of values