332949
domain: N
Appears in sequences
- Pseudoprimes k to base 2 such that k-2 and k+2 are primes.at n=3A057942
- Numbers k that divide Fibonacci(k-1) but do not divide Fibonacci(k) - 1.at n=25A094410
- Pseudoprimes (base-2) equal to product of 4 primes not necessarily distinct.at n=22A112441
- Sarrus numbers that become prime when two is added.at n=15A137198
- Intersection of A001567 and A212502.at n=15A212601
- Composite numbers k such that k divides Fibonacci(k+1) or Fibonacci(k-1) and 2^(k-1) == 1 (mod k).at n=6A214434
- Pseudoprimes to a twin prime criterion of Aebi and Cairns.at n=16A224695
- Sarrus numbers (A001567) that are the average of two consecutive primes.at n=9A265684
- Composite numbers k such that Pell(k) == -1 (mod k).at n=15A319043
- a(n) = Sum_{k=1..n} n^Omega(k).at n=22A347614