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.

A188685 Partial alternating sums of binomial(3n,n)^2/(2n+1)^2.

Table of values

n a(n)
0 1
1 0
2 9
3 135
4 2890
5 71639
6 1967545
7 58125959
8 1813561210
9 59034994415
10 1987910416810
11 68818255912790
12 2437897047570874
13 88061136002276310
14 3234416650430634090
15 120525771933269446806
16 4548292982313797644875

List of values

[1, 0, 9, 135, 2890, 71639, 1967545, 58125959, 1813561210, 59034994415, 1987910416810, 68818255912790, 2437897047570874, 88061136002276310, 3234416650430634090, 120525771933269446806, 4548292982313797644875]

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

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