Number of 3-cycles in the n X n black bishop graph.

Terms

a(0) =0a(1) =0a(2) =2a(3) =6a(4) =24a(5) =50a(6) =114a(7) =196a(8) =352a(9) =540a(10) =850a(11) =1210a(12) =1752a(13) =2366a(14) =3234a(15) =4200a(16) =5504a(17) =6936a(18) =8802a(19) =10830a(20) =13400a(21) =16170a(22) =19602a(23) =23276a(24) =27744a(25) =32500a(26) =38194a(27) =44226a(28) =51352a(29) =58870