855718194320domain: NAppears in sequencesNumber of perfect matchings on an n X n L-shaped graph.at n=29A079472Denominators a(n) of Pythagorean approximations b(n)/a(n) to 1/2.at n=28A195547Numbers n such that n^3 = x*y*z where 2 <= x <= y <= z , n^3+1 = (x-1)*(y+1)*(z+1).at n=14A240836