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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.

A214400 a(n) = binomial(n^2 + 3*n, n).

Table of values

n a(n)
0 1
1 4
2 45
3 816
4 20475
5 658008
6 25827165
7 1198774720
8 64276915527
9 3911395881900
10 266401260897200
11 20082459351180240
12 1660305826125766950
13 149389005978091284720
14 14533945899753270066525
15 1520398315196482557890304
16 170190601112537814791748255

List of values

[1, 4, 45, 816, 20475, 658008, 25827165, 1198774720, 64276915527, 3911395881900, 266401260897200, 20082459351180240, 1660305826125766950, 149389005978091284720, 14533945899753270066525, 1520398315196482557890304, 170190601112537814791748255]

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

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