A248437 - cp's OEIS frontend

A248437 Number of length 4+2 0..n arrays with every three consecutive terms having the sum of some two elements equal to twice the third.

n	a(n)
1	2
2	9
3	28
4	101
5	198
6	327
7	462
8	691
9	932
10	1203
11	1474
12	1829
13	2184
14	2551
15	2954
16	3459
17	3964
18	4501
19	5038
20	5653
21	6286
22	6925
23	7564
24	8327
25	9114
26	9907
27	10712
28	11577
29	12442
30	13363
31	14284
32	15307
33	16342
34	17383
35	18454
36	19609
37	20764
38	21925
39	23098
40	24389
41	25680
42	27009

[2, 9, 28, 101, 198, 327, 462, 691, 932, 1203, 1474, 1829, 2184, 2551, 2954, 3459, 3964, 4501, 5038, 5653, 6286, 6925, 7564, 8327, 9114, 9907, 10712, 11577, 12442, 13363, 14284, 15307, 16342, 17383, 18454, 19609, 20764, 21925, 23098, 24389, 25680, 27009]

cp's OEIS Frontend

A248437 Number of length 4+2 0..n arrays with every three consecutive terms having the sum of some two elements equal to twice the third.

Table of values

List of values