153781domain: NAppears in sequencesStrong pseudoprimes to base 26.at n=32A020252Composite numbers k such that k divides F(k-1) where F(j) are the Fibonacci numbers.at n=34A069106Numbers k that divide Fibonacci(k-1) but do not divide Fibonacci(k) - 1.at n=18A094410Semiprimes k that divide Fibonacci(k-1).at n=22A177086