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.

A270444 Expansion of 2*(1+2*x) / (1-8*x+4*x^2).

Table of values

n a(n)
1 2
2 20
3 152
4 1136
5 8480
6 63296
7 472448
8 3526400
9 26321408
10 196465664
11 1466439680
12 10945654784
13 81699479552
14 609813217280
15 4551707820032
16 33974409691136
17 253588446248960
18 1892809931227136
19 14128125664821248
20 105453765593661440

List of values

[2, 20, 152, 1136, 8480, 63296, 472448, 3526400, 26321408, 196465664, 1466439680, 10945654784, 81699479552, 609813217280, 4551707820032, 33974409691136, 253588446248960, 1892809931227136, 14128125664821248, 105453765593661440]

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

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