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.

A190512 Number of one-sided n-step prudent walks, avoiding single west step only, i.e., two or more consecutive west steps are permitted.

Table of values

n a(n)
0 1
1 2
2 5
3 11
4 24
5 53
6 117
7 258
8 569
9 1255
10 2768
11 6105
12 13465
13 29698
14 65501
15 144467
16 318632
17 702765
18 1549997
19 3418626
20 7540017
21 16630031
22 36678688
23 80897393
24 178424817
25 393528322
26 867954037
27 1914332891
28 4222194104
29 9312342245
30 20539017381
31 45300228866

List of values

[1, 2, 5, 11, 24, 53, 117, 258, 569, 1255, 2768, 6105, 13465, 29698, 65501, 144467, 318632, 702765, 1549997, 3418626, 7540017, 16630031, 36678688, 80897393, 178424817, 393528322, 867954037, 1914332891, 4222194104, 9312342245, 20539017381, 45300228866]

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

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