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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.

A045509 Factorials having initial digit '1'.

Table of values

n a(n)
1 1
2 120
3 1307674368000
4 121645100408832000
5 1124000727777607680000
6 15511210043330985984000000
7 10888869450418352160768000000
8 10333147966386144929666651337523200000000
9 13763753091226345046315979581580902400000000

List of values

[1, 120, 1307674368000, 121645100408832000, 1124000727777607680000, 15511210043330985984000000, 10888869450418352160768000000, 10333147966386144929666651337523200000000, 13763753091226345046315979581580902400000000]

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

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