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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.

A186341 a(n)=sum{k=0..floor(n/2), binomial(n-k,k)*A186338(k)}.

Table of values

n a(n)
0 1
1 1
2 3
3 5
4 15
5 33
6 95
7 237
8 667
9 1765
10 4943
11 13505
12 37967
13 105837
14 299675
15 847253
16 2417903
17 6909409
18 19866303
19 57253165
20 165728475
21 480938693
22 1400391247
23 4087481409
24 11963060527
25 35089773869
26 103157489499
27 303856951925
28 896755068783
29 2651120922081
30 7850714948511

List of values

[1, 1, 3, 5, 15, 33, 95, 237, 667, 1765, 4943, 13505, 37967, 105837, 299675, 847253, 2417903, 6909409, 19866303, 57253165, 165728475, 480938693, 1400391247, 4087481409, 11963060527, 35089773869, 103157489499, 303856951925, 896755068783, 2651120922081, 7850714948511]

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

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