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.

A383842 Expansion of 1/((1-x) * (1-2*x) * (1-3*x) * (1-4*x))^2.

Table of values

n a(n)
0 1
1 20
2 230
3 2000
4 14627
5 95060
6 567240
7 3174400
8 16904053
9 86549620
10 429352330
11 2075659600
12 9822847079
13 45665147700
14 209129160300
15 945597624000
16 4229196800505
17 18738054705300
18 82347219011950
19 359322115058000
20 1558151553849131
21 6719660438870420
22 28838298857544080

List of values

[1, 20, 230, 2000, 14627, 95060, 567240, 3174400, 16904053, 86549620, 429352330, 2075659600, 9822847079, 45665147700, 209129160300, 945597624000, 4229196800505, 18738054705300, 82347219011950, 359322115058000, 1558151553849131, 6719660438870420, 28838298857544080]