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.

A000344 a(n) = 5*binomial(2n, n-2)/(n+3).

Table of values

n a(n)
2 1
3 5
4 20
5 75
6 275
7 1001
8 3640
9 13260
10 48450
11 177650
12 653752
13 2414425
14 8947575
15 33266625
16 124062000
17 463991880
18 1739969550
19 6541168950
20 24647883000
21 93078189750
22 352207870014
23 1335293573130
24 5071418015120
25 19293438101000
26 73514652074500
27 280531912316292

List of values

[1, 5, 20, 75, 275, 1001, 3640, 13260, 48450, 177650, 653752, 2414425, 8947575, 33266625, 124062000, 463991880, 1739969550, 6541168950, 24647883000, 93078189750, 352207870014, 1335293573130, 5071418015120, 19293438101000, 73514652074500, 280531912316292]

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

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