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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.

A275653 a(n) = binomial(4*n,2*n)*binomial(3*n,2*n).

Table of values

n a(n)
0 1
1 18
2 1050
3 77616
4 6370650
5 554822268
6 50199951984
7 4664758248000
8 442077195513690
9 42533571002422500
10 4141601026094832300
11 407220411993767798400
12 40363606408574136870000
13 4028061310168832261158176
14 404311537318239680601595200
15 40785601782042745410592271616

List of values

[1, 18, 1050, 77616, 6370650, 554822268, 50199951984, 4664758248000, 442077195513690, 42533571002422500, 4141601026094832300, 407220411993767798400, 40363606408574136870000, 4028061310168832261158176, 404311537318239680601595200, 40785601782042745410592271616]

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

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