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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.

A233003 (n!)^2 mod Pt(n), where Pt(n) is product of first n positive triangular numbers (A000217).

Table of values

n a(n)
1 0
2 1
3 0
4 36
5 900
6 8100
7 0
8 25401600
9 514382400
10 12859560000
11 6224027040000
12 56016243360000
13 9466745127840000
14 1855482045056640000
15 0
16 6679735362203904000000
17 13513104637738497792000000
18 156365925093831188736000000
19 225792395835492236534784000000
20 22579239583549223653478400000000

List of values

[0, 1, 0, 36, 900, 8100, 0, 25401600, 514382400, 12859560000, 6224027040000, 56016243360000, 9466745127840000, 1855482045056640000, 0, 6679735362203904000000, 13513104637738497792000000, 156365925093831188736000000, 225792395835492236534784000000, 22579239583549223653478400000000]

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

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