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.

A352985 a(n) = Sum_{k=0..floor(n/2)} k^(2*(n-2*k)).

Table of values

n a(n)
0 1
1 0
2 1
3 1
4 2
5 5
6 18
7 74
8 339
9 1770
10 10915
11 79555
12 663140
13 6109351
14 61264436
15 669862580
16 8044351557
17 106331744724
18 1536980041573
19 24028469781765
20 402558463751974
21 7195932984364585
22 137204787854813174
23 2792969599543659326
24 60668198155262809815

List of values

[1, 0, 1, 1, 2, 5, 18, 74, 339, 1770, 10915, 79555, 663140, 6109351, 61264436, 669862580, 8044351557, 106331744724, 1536980041573, 24028469781765, 402558463751974, 7195932984364585, 137204787854813174, 2792969599543659326, 60668198155262809815]