Number of nonsquare rectangles on an n X n board.

Terms

a(0) =0a(1) =4a(2) =22a(3) =70a(4) =170a(5) =350a(6) =644a(7) =1092a(8) =1740a(9) =2640a(10) =3850a(11) =5434a(12) =7462a(13) =10010a(14) =13160a(15) =17000a(16) =21624a(17) =27132a(18) =33630a(19) =41230a(20) =50050a(21) =60214a(22) =71852a(23) =85100a(24) =100100a(25) =117000a(26) =135954a(27) =157122a(28) =180670a(29) =206770