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.

A352066 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/4)} binomial(n-1,4*k) * a(k).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 2
6 6
7 16
8 36
9 72
10 136
11 256
12 496
13 992
14 2016
15 4096
16 8256
17 16512
18 32896
19 65536
20 130816
21 261633
22 523797
23 1048807
24 2099947
25 4206983
26 8443911
27 17009071
28 34452991
29 70311167
30 144818751
31 301455871
32 634774911
33 1352698367
34 2917079551
35 6362776831
36 14025038591

List of values

[1, 1, 1, 1, 1, 2, 6, 16, 36, 72, 136, 256, 496, 992, 2016, 4096, 8256, 16512, 32896, 65536, 130816, 261633, 523797, 1048807, 2099947, 4206983, 8443911, 17009071, 34452991, 70311167, 144818751, 301455871, 634774911, 1352698367, 2917079551, 6362776831, 14025038591]