Number of solenoidal flows (flow in = flow out) in a 3 X 3 square array with integer velocities -n .. n.

A068722

Number of solenoidal flows (flow in = flow out) in a 3 X 3 square array with integer velocities -n .. n.

Terms

    a(0) =1a(1) =35a(2) =247a(3) =925a(4) =2501a(5) =5551a(6) =10795a(7) =19097a(8) =31465a(9) =49051a(10) =73151a(11) =105205a(12) =146797a(13) =199655a(14) =265651a(15) =346801a(16) =445265a(17) =563347a(18) =703495a(19) =868301a(20) =1060501a(21) =1282975a(22) =1538747a(23) =1830985a(24) =2163001a(25) =2538251a(26) =2960335a(27) =3432997a(28) =3960125a(29) =4545751

External references