A248439 - cp's OEIS frontend

A248439 Number of length 6+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	44
4	261
5	590
6	1105
7	1684
8	2775
9	3978
10	5365
11	6776
12	8639
13	10512
14	12467
15	14562
16	17349
17	20144
18	23213
19	26282
20	29727
21	33264
22	36831
23	40398
24	44775
25	49264
26	53769
27	58386
28	63261
29	68136
30	73375
31	78614
32	84601
33	90640
34	96693
35	102922
36	109691
37	116460
38	123235

[2, 9, 44, 261, 590, 1105, 1684, 2775, 3978, 5365, 6776, 8639, 10512, 12467, 14562, 17349, 20144, 23213, 26282, 29727, 33264, 36831, 40398, 44775, 49264, 53769, 58386, 63261, 68136, 73375, 78614, 84601, 90640, 96693, 102922, 109691, 116460, 123235]

cp's OEIS Frontend

A248439 Number of length 6+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