Number of rhombuses on a (n+1)X8 grid.

Terms

a(0) =7a(1) =32a(2) =82a(3) =164a(4) =273a(5) =412a(6) =564a(7) =736a(8) =918a(9) =1112a(10) =1306a(11) =1520a(12) =1734a(13) =1960a(14) =2198a(15) =2448a(16) =2698a(17) =2964a(18) =3230a(19) =3508a(20) =3790a(21) =4084a(22) =4378a(23) =4684a(24) =4996a(25) =5320a(26) =5644a(27) =5980a(28) =6316a(29) =6664