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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.

A213705 a(n)=n if n <= 3, otherwise a(n) = A007477(n-1) + A007477(n).

Table of values

n a(n)
1 1
2 2
3 3
4 5
5 9
6 17
7 33
8 66
9 134
10 277
11 579
12 1224
13 2610
14 5609
15 12135
16 26408
17 57770
18 126962
19 280192
20 620674
21 1379586
22 3075943
23 6877611
24 15417934
25 34646156
26 78027146
27 176087292
28 398143230
29 901827322
30 2046112299
31 4649558191
32 10581041518
33 24112473412
34 55019560650
35 125696393844
36 287494670302

List of values

[1, 2, 3, 5, 9, 17, 33, 66, 134, 277, 579, 1224, 2610, 5609, 12135, 26408, 57770, 126962, 280192, 620674, 1379586, 3075943, 6877611, 15417934, 34646156, 78027146, 176087292, 398143230, 901827322, 2046112299, 4649558191, 10581041518, 24112473412, 55019560650, 125696393844, 287494670302]

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

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