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.

A072335 Expansion of 1/((1-x^2)*(1-4*x+x^2)).

Table of values

n a(n)
0 1
1 4
2 16
3 60
4 225
5 840
6 3136
7 11704
8 43681
9 163020
10 608400
11 2270580
12 8473921
13 31625104
14 118026496
15 440480880
16 1643897025
17 6135107220
18 22896531856
19 85451020204
20 318907548961
21 1190179175640
22 4441809153600
23 16577057438760
24 61866420601441
25 230888624967004

List of values

[1, 4, 16, 60, 225, 840, 3136, 11704, 43681, 163020, 608400, 2270580, 8473921, 31625104, 118026496, 440480880, 1643897025, 6135107220, 22896531856, 85451020204, 318907548961, 1190179175640, 4441809153600, 16577057438760, 61866420601441, 230888624967004]

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

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