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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.

A139189 a(n) = prime(n)!-1.

Table of values

n a(n)
1 1
2 5
3 119
4 5039
5 39916799
6 6227020799
7 355687428095999
8 121645100408831999
9 25852016738884976639999
10 8841761993739701954543615999999
11 8222838654177922817725562879999999
12 13763753091226345046315979581580902399999999
13 33452526613163807108170062053440751665151999999999
14 60415263063373835637355132068513997507264511999999999
15 258623241511168180642964355153611979969197632389119999999999
16 4274883284060025564298013753389399649690343788366813724671999999999999
17 138683118545689835737939019720389406345902876772687432540821294940159999999999999

List of values

[1, 5, 119, 5039, 39916799, 6227020799, 355687428095999, 121645100408831999, 25852016738884976639999, 8841761993739701954543615999999, 8222838654177922817725562879999999, 13763753091226345046315979581580902399999999, 33452526613163807108170062053440751665151999999999, 60415263063373835637355132068513997507264511999999999, 258623241511168180642964355153611979969197632389119999999999, 4274883284060025564298013753389399649690343788366813724671999999999999, 138683118545689835737939019720389406345902876772687432540821294940159999999999999]

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