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.

A040075 5-fold convolution of A000302 (powers of 4); expansion of 1/(1-4*x)^5.

Table of values

n a(n)
0 1
1 20
2 240
3 2240
4 17920
5 129024
6 860160
7 5406720
8 32440320
9 187432960
10 1049624576
11 5725224960
12 30534533120
13 159719096320
14 821412495360
15 4161823309824
16 20809116549120
17 102821517066240
18 502682972323840
19 2434043865989120
20 11683410556747776
21 55635288365465600

List of values

[1, 20, 240, 2240, 17920, 129024, 860160, 5406720, 32440320, 187432960, 1049624576, 5725224960, 30534533120, 159719096320, 821412495360, 4161823309824, 20809116549120, 102821517066240, 502682972323840, 2434043865989120, 11683410556747776, 55635288365465600]

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

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