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.

A228111 Integer nearest to (S(n)*F(4n)(S(n))), where F(4n)(x) are Fibonacci polynomials of multiple of 4 indices (4n) and S(n) = Sum_{i=0..3} (C(i)*(log(log(A*(B+n^2))))^i) (see coefficients A, B, C(i) in comments).

Table of values

n a(n)
1 4
2 21
3 143
4 1063
5 8385
6 68929
7 584467
8 5074924
9 44885325
10 402777151
11 3656032622
12 33492393634
13 309106153431
14 2870123507479
15 26783122426197
16 250971797533095
17 2359952229466124
18 22256979400698116
19 210440626023838163
20 1994088284872617955
21 18931694933036811169

List of values

[4, 21, 143, 1063, 8385, 68929, 584467, 5074924, 44885325, 402777151, 3656032622, 33492393634, 309106153431, 2870123507479, 26783122426197, 250971797533095, 2359952229466124, 22256979400698116, 210440626023838163, 1994088284872617955, 18931694933036811169]