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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.

A260656 a(n) = lcm{!2, !3, ..., !n}, where !n = A000166(n) is subfactorial.

Table of values

n a(n)
2 1
3 2
4 18
5 396
6 104940
7 10808820
8 160327227060
9 486432806900040
10 72152091814676033160
11 105952244289903723626034120
12 1697305261921685687642685992397720
13 108004858262683508632706244802225075247640
14 266448824855803491635798907952730108331437779905720

List of values

[1, 2, 18, 396, 104940, 10808820, 160327227060, 486432806900040, 72152091814676033160, 105952244289903723626034120, 1697305261921685687642685992397720, 108004858262683508632706244802225075247640, 266448824855803491635798907952730108331437779905720]

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

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