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.

A099571 a(n) = Sum_{k=0..floor(n/2)} binomial(n-k+3, k).

Table of values

n a(n)
0 1
1 1
2 5
3 6
4 17
5 23
6 50
7 73
8 138
9 211
10 370
11 581
12 979
13 1560
14 2575
15 4135
16 6755
17 10890
18 17700
19 28590
20 46356
21 74946
22 121380
23 196326
24 317797
25 514123
26 832025
27 1346148
28 2178293
29 3524441
30 5702870
31 9227311
32 14930334
33 24157645
34 39088150
35 63245795

List of values

[1, 1, 5, 6, 17, 23, 50, 73, 138, 211, 370, 581, 979, 1560, 2575, 4135, 6755, 10890, 17700, 28590, 46356, 74946, 121380, 196326, 317797, 514123, 832025, 1346148, 2178293, 3524441, 5702870, 9227311, 14930334, 24157645, 39088150, 63245795]