Number of collinear point 5-tuples in an n X n .. X n 4-dimensional cubical grid.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =888a(5) =9952a(6) =58360a(7) =241600a(8) =825560a(9) =2337408a(10) =5997720a(11) =13677376a(12) =29637936a(13) =58967520a(14) =112217328a(15) =203187264a(16) =356500560a(17) =595939648a(18) =978817680a(19) =1546416960a(20) =2405951944a(21) =3652967008a(22) =5438947528a(23) =7891156160a(24) =11396568424a(25) =16126862080