123139domain: NAppears in sequencesStrong pseudoprimes to base 80.at n=30A020306Number of (n+1)X6 0..2 arrays with every 2x2 subblock summing to 4.at n=8A183628Expansion of (5-8*x-15*x^2+4*x^3+4*x^4)/(1-2*x-5*x^2+2*x^3+4*x^4+x^5).at n=10A189236