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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.

A059728 a(0)=3; thereafter, a(n) = A002426(n+1) + Fibonacci(n-1)*(Fibonacci(n-1) + 1).

Table of values

n a(n)
0 3
1 3
2 9
3 21
4 57
5 153
6 423
7 1179
8 3321
9 9415
10 26843
11 76869
12 220951
13 637107
14 1842129
15 5339133
16 15507641
17 45127965
18 131548859
19 384059009
20 1122835671
21 3286907517
22 9633053985
23 28262033613
24 82998088607
25 243963263943
26 717698981853
27 2112976735749

List of values

[3, 3, 9, 21, 57, 153, 423, 1179, 3321, 9415, 26843, 76869, 220951, 637107, 1842129, 5339133, 15507641, 45127965, 131548859, 384059009, 1122835671, 3286907517, 9633053985, 28262033613, 82998088607, 243963263943, 717698981853, 2112976735749]

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

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