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.

A271357 a(n) = k*Fibonacci(2*n+1) + (k+1)*Fibonacci(2*n), where k=3.

Table of values

n a(n)
0 3
1 10
2 27
3 71
4 186
5 487
6 1275
7 3338
8 8739
9 22879
10 59898
11 156815
12 410547
13 1074826
14 2813931
15 7366967
16 19286970
17 50493943
18 132194859
19 346090634
20 906077043
21 2372140495
22 6210344442
23 16258892831
24 42566334051
25 111440109322
26 291753993915
27 763821872423
28 1999711623354

List of values

[3, 10, 27, 71, 186, 487, 1275, 3338, 8739, 22879, 59898, 156815, 410547, 1074826, 2813931, 7366967, 19286970, 50493943, 132194859, 346090634, 906077043, 2372140495, 6210344442, 16258892831, 42566334051, 111440109322, 291753993915, 763821872423, 1999711623354]