Place a point on the integer coordinates, up to |n|, along all four axial directions on a Cartesian plane, and then join an infinite straight line between every pair of points: a(n) is the number of finite edges created in the resulting graph.
A386561
Place a point on the integer coordinates, up to |n|, along all four axial directions on a Cartesian plane, and then join an infinite straight line between every pair of points: a(n) is the number of finite edges created in the resulting graph.
Terms
- a(0) =8a(1) =136a(2) =804a(3) =2608a(4) =6568a(5) =13396a(6) =26556a(7) =45120a(8) =73060a(9) =110984a(10) =171144a(11) =238900a(12) =344212a(13) =462788a(14) =607384a(15) =786476a(16) =1037772a(17) =1293904a(18) =1654432a(19) =2013768a(20) =2447312a(21) =2965392
External references
- oeis: A386561