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.

A215118 G.f. satisfies: A(x) = x + 4*x^2 + x*A(A(A(A(A(x))))).

Table of values

n a(n)
1 1
2 5
3 25
4 625
5 18125
6 628125
7 25390625
8 1158515625
9 58308203125
10 3190470703125
11 187941103515625
12 11832996337890625
13 791834056298828125
14 56063448811767578125
15 4184231129351806640625
16 328154000925299072265625
17 26970505516268341064453125
18 2317475342690856231689453125

List of values

[1, 5, 25, 625, 18125, 628125, 25390625, 1158515625, 58308203125, 3190470703125, 187941103515625, 11832996337890625, 791834056298828125, 56063448811767578125, 4184231129351806640625, 328154000925299072265625, 26970505516268341064453125, 2317475342690856231689453125]

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

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