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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.

A309804 a(n) is the coefficient of x^n in the polynomial Product_{i=1..n+4} (prime(i)*x-1).

Table of values

n a(n)
0 1
1 28
2 652
3 16186
4 414849
5 11970750
6 411154568
7 14802996860
8 617651235401
9 28112591190218
10 1330940558814492
11 68134228016658366
12 3888046744502816953
13 244783216404832868510
14 15878401438954693327808
15 1123935467586630569656024
16 83970858613393528568199649

List of values

[1, 28, 652, 16186, 414849, 11970750, 411154568, 14802996860, 617651235401, 28112591190218, 1330940558814492, 68134228016658366, 3888046744502816953, 244783216404832868510, 15878401438954693327808, 1123935467586630569656024, 83970858613393528568199649]

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

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