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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.

A068912 Number of n step walks (each step +/-1 starting from 0) which are never more than 3 or less than -3.

Table of values

n a(n)
0 1
1 2
2 4
3 8
4 14
5 28
6 48
7 96
8 164
9 328
10 560
11 1120
12 1912
13 3824
14 6528
15 13056
16 22288
17 44576
18 76096
19 152192
20 259808
21 519616
22 887040
23 1774080
24 3028544
25 6057088
26 10340096
27 20680192
28 35303296
29 70606592
30 120532992
31 241065984
32 411525376
33 823050752
34 1405035520
35 2810071040

List of values

[1, 2, 4, 8, 14, 28, 48, 96, 164, 328, 560, 1120, 1912, 3824, 6528, 13056, 22288, 44576, 76096, 152192, 259808, 519616, 887040, 1774080, 3028544, 6057088, 10340096, 20680192, 35303296, 70606592, 120532992, 241065984, 411525376, 823050752, 1405035520, 2810071040]

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

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