62609domain: NAppears in sequencesa(3n) = floor(43*2^n/28) - 1, a(3n+1) = a(3n) + 3*2^(n-3), a(3n+2) = floor(17*2^n/7 - 6/7) for n>=3.at n=46A123946Expansion of 8/(sqrt(1-8*x)*(sqrt(1-8*x)+4*x+7)).at n=6A128419Number of ways to partition a 2*n X 3 grid into 6 connected equal-area regions.at n=5A167245