Number of regions in a graph of n adjacent rectangles in a row with all possible diagonals drawn, as in A306302, but without the rectangles' edges which are perpendicular to the row.
A369175
Number of regions in a graph of n adjacent rectangles in a row with all possible diagonals drawn, as in A306302, but without the rectangles' edges which are perpendicular to the row.
Terms
- a(0) =2a(1) =12a(2) =36a(3) =86a(4) =180a(5) =330a(6) =570a(7) =918a(8) =1408a(9) =2058a(10) =2946a(11) =4054a(12) =5502a(13) =7278a(14) =9430a(15) =12006a(16) =15174a(17) =18846a(18) =23268a(19) =28338a(20) =34172a(21) =40806a(22) =48546a(23) =57174a(24) =67022a(25) =78006a(26) =90324a(27) =103910a(28) =119276a(29) =135978
External references
- oeis: A369175