A081548 Smallest composite number which is 1 more than the product of n distinct primes.
4, 15, 106, 391, 3991, 30031, 510511, 9699691, 223092871, 6469693231, 255887521891, 7420738134811, 304250263527211, 13082761331670031, 614889782588491411, 32589158477190044731, 1922760350154212639071, 117288381359406970983271, 7858321551080267055879091, 557940830126698960967415391
Offset: 1
Keywords
Links
- Chai Wah Wu, Table of n, a(n) for n = 1..74
Formula
If n is in A014545, then a(n) > A002110(n)+1, otherwise a(n) = A002110(n)+1. - Chai Wah Wu, Sep 02 2024
Extensions
Corrected and extended by David Wasserman, Jun 08 2004
a(18)-a(20) from Chai Wah Wu, Sep 02 2024