Square rings obtained by adding four identical cuboids from A169938, a(n) = 4*n*(n+1)*(n*(n+1)+1).

Terms

a(0) =0a(1) =24a(2) =168a(3) =624a(4) =1680a(5) =3720a(6) =7224a(7) =12768a(8) =21024a(9) =32760a(10) =48840a(11) =70224a(12) =97968a(13) =133224a(14) =177240a(15) =231360a(16) =297024a(17) =375768a(18) =469224a(19) =579120a(20) =707280a(21) =855624a(22) =1026168a(23) =1221024a(24) =1442400a(25) =1692600a(26) =1974024a(27) =2289168a(28) =2640624a(29) =3031080