113345domain: NAppears in sequencesOctanacci numbers.at n=22A123526Pseudoprimes to base 7, written in base 7.at n=29A262104a(n) = a(n-1) + a(n-2) - n*a(floor(n/2)), where a(0) = 1, a(1) = 2, a(2) = 3.at n=21A298401