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.

A347493 a(0) = 1, a(1) = 0, a(2) = a(3) = 1; thereafter, a(n) = a(n-1) + a(n-2) + a(n-4).

Table of values

n a(n)
0 1
1 0
2 1
3 1
4 3
5 4
6 8
7 13
8 24
9 41
10 73
11 127
12 224
13 392
14 689
15 1208
16 2121
17 3721
18 6531
19 11460
20 20112
21 35293
22 61936
23 108689
24 190737
25 334719
26 587392
27 1030800
28 1808929
29 3174448
30 5570769
31 9776017
32 17155715
33 30106180
34 52832664
35 92714861
36 162703240
37 285524281
38 501060185
39 879299327
40 1543062752

List of values

[1, 0, 1, 1, 3, 4, 8, 13, 24, 41, 73, 127, 224, 392, 689, 1208, 2121, 3721, 6531, 11460, 20112, 35293, 61936, 108689, 190737, 334719, 587392, 1030800, 1808929, 3174448, 5570769, 9776017, 17155715, 30106180, 52832664, 92714861, 162703240, 285524281, 501060185, 879299327, 1543062752]