72885
domain: N
Appears in sequences
- Sarrus numbers with more than 2 distinct prime factors.at n=36A080747
- Pseudotwinprimes p+2 for primes p such that p+2 divides p^(p+2)+2 and p+2 is composite.at n=25A100873
- Pseudoprimes (base-2) equal to product of 4 primes not necessarily distinct.at n=8A112441
- a(n) = 225*n^2 - 15.at n=17A158559
- Increasing gaps between 2-pseudoprimes (upper end).at n=11A175737
- Fermat pseudoprimes to base 2 of the form (6*k - 1)*((6*k - 2)*n + 1), where k and n are positive integers.at n=34A210993
- Pseudoprimes divisible by a smaller pseudoprime.at n=5A215150
- Fermat pseudoprimes to base 2 divisible by 5.at n=13A216023
- Fermat pseudoprimes to base 2 divisible by 15.at n=5A216364
- Fermat pseudoprimes to base 2 which are not Euler pseudoprimes to base 2.at n=29A227136
- Poulet numbers which are not super-Poulet numbers.at n=36A306487
- Expansion of e.g.f. A(x) satisfying Sum_{n>=0} (A(x)^n - x)^n / n! = 1.at n=6A371710