The number of edges in a graph induced by a regular drawing of K_{n,n}.

Terms

a(0) =1a(1) =6a(2) =24a(3) =74a(4) =170a(5) =362a(6) =642a(7) =1110a(8) =1766a(9) =2706a(10) =3894a(11) =5558a(12) =7602a(13) =10326a(14) =13562a(15) =17510a(16) =22178a(17) =28006a(18) =34634a(19) =42722a(20) =51922a(21) =62570a(22) =74450a(23) =88462a(24) =103994a(25) =121862a(26) =141482a(27) =163610a(28) =187886a(29) =215578