199655

Appears in sequences

• a(n) = (3^n+1) * (3^(n+1)+1) / 8.at n=6A051406
• Number of solenoidal flows (flow in = flow out) in a 3 X 3 square array with integer velocities -n .. n.at n=13A068722
• Number of solenoidal flows (flow in = flow out) in an n X n square array with integer velocities in -13 .. 13.at n=2A068738
• Number of (w,x,y,z) with all terms in {1,...,n} and w > |x-y| + |y-z|.at n=27A212674