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.

A241794 Number of ballot sequences of length n having exactly one descent.

Table of values

n a(n)
3 1
4 5
5 16
6 43
7 99
8 215
9 430
10 834
11 1529
12 2765
13 4792
14 8216
15 13684
16 22575
17 36402
18 58285
19 91617
20 143097
21 220317
22 337100
23 509718
24 766655
25 1141457
26 1690994
27 2484138
28 3631902
29 5271297
30 7617750
31 10937657
32 15640771
33 22240250
34 31502316
35 44396662
36 62345539
37 87149572

List of values

[1, 5, 16, 43, 99, 215, 430, 834, 1529, 2765, 4792, 8216, 13684, 22575, 36402, 58285, 91617, 143097, 220317, 337100, 509718, 766655, 1141457, 1690994, 2484138, 3631902, 5271297, 7617750, 10937657, 15640771, 22240250, 31502316, 44396662, 62345539, 87149572]