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.

A383702 Coefficient of x^2 in expansion of (x+3) * (x+7) * ... * (x+4*n-1).

Table of values

n a(n)
0 0
1 0
2 1
3 21
4 446
5 10670
6 290599
7 8951355
8 308846124
9 11822475564
10 497794079421
11 22881487815153
12 1140642637297866
13 61312161303209466
14 3535773901817957955
15 217787248332803277495
16 14271822475100747003160
17 991517953843097370650520
18 72799719644532661375481145

List of values

[0, 0, 1, 21, 446, 10670, 290599, 8951355, 308846124, 11822475564, 497794079421, 22881487815153, 1140642637297866, 61312161303209466, 3535773901817957955, 217787248332803277495, 14271822475100747003160, 991517953843097370650520, 72799719644532661375481145]

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

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