Number of 2 X 2 square tiles in a discrete 4-dimensional hypercube of side length n.

Terms

a(0) =0a(1) =16a(2) =132a(3) =504a(4) =1360a(5) =3000a(6) =5796a(7) =10192a(8) =16704a(9) =25920a(10) =38500a(11) =55176a(12) =76752a(13) =104104a(14) =138180a(15) =180000a(16) =230656a(17) =291312a(18) =363204a(19) =447640a(20) =546000a(21) =659736a(22) =790372a(23) =939504a(24) =1108800a(25) =1300000a(26) =1514916a(27) =1755432a(28) =2023504a(29) =2321160