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.

A235701 Number of n step walks (each step +/- 1 starting from 0) which are never more than 6 or less than -6.

Table of values

n a(n)
0 1
1 2
2 4
3 8
4 16
5 32
6 64
7 126
8 252
9 490
10 980
11 1890
12 3780
13 7252
14 14504
15 27734
16 55468
17 105840
18 211680
19 403368
20 806736
21 1535954
22 3071908
23 5845406
24 11690812
25 22238062
26 44476124
27 84582428
28 169164856
29 321661970
30 643323940
31 1223146232
32 2446292464
33 4650833040

List of values

[1, 2, 4, 8, 16, 32, 64, 126, 252, 490, 980, 1890, 3780, 7252, 14504, 27734, 55468, 105840, 211680, 403368, 806736, 1535954, 3071908, 5845406, 11690812, 22238062, 44476124, 84582428, 169164856, 321661970, 643323940, 1223146232, 2446292464, 4650833040]

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

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