75222domain: NAppears in sequencesG.f.: Product_{n>=1} (1 - A002203(n)*x^n + (-1)^n*x^(2*n))^3 where A002203(n) is the companion Pell numbers.at n=11A204383Number of ways two L-tiles (with rotation) can be placed on an n X n square.at n=10A348134