cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A248438 Number of length 5+2 0..n arrays with every three consecutive terms having the sum of some two elements equal to twice the third.

Table of values

n a(n)
1 2
2 9
3 36
4 165
5 342
6 601
7 884
8 1381
9 1922
10 2533
11 3144
12 3957
13 4770
14 5613
15 6524
16 7697
17 8870
18 10149
19 11428
20 12873
21 14362
22 15857
23 17352
24 19165
25 21026
26 22893
27 24804
28 26841
29 28878
30 31061
31 33244
32 35697
33 38170
34 40649
35 43200
36 45977
37 48754
38 51537
39 54340
40 57421

List of values

[2, 9, 36, 165, 342, 601, 884, 1381, 1922, 2533, 3144, 3957, 4770, 5613, 6524, 7697, 8870, 10149, 11428, 12873, 14362, 15857, 17352, 19165, 21026, 22893, 24804, 26841, 28878, 31061, 33244, 35697, 38170, 40649, 43200, 45977, 48754, 51537, 54340, 57421]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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