Sum of the areas of all bargraphs of site-perimeter n.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =0a(6) =4a(7) =6a(8) =14a(9) =36a(10) =77a(11) =168a(12) =395a(13) =851a(14) =1921a(15) =4254a(16) =9461a(17) =20991a(18) =46619a(19) =103360a(20) =229461a(21) =508731a(22) =1128706a(23) =2503028a(24) =5552197a(25) =12313707a(26) =27313442a(27) =60581866a(28) =134384684a(29) =298097515