Partial sums of ceiling(n^2/4).

Terms

a(0) =0a(1) =1a(2) =2a(3) =5a(4) =9a(5) =16a(6) =25a(7) =38a(8) =54a(9) =75a(10) =100a(11) =131a(12) =167a(13) =210a(14) =259a(15) =316a(16) =380a(17) =453a(18) =534a(19) =625a(20) =725a(21) =836a(22) =957a(23) =1090a(24) =1234a(25) =1391a(26) =1560a(27) =1743a(28) =1939a(29) =2150