Number of 4-cycles in the n X n king graph.

Terms

a(0) =0a(1) =3a(2) =29a(3) =79a(4) =153a(5) =251a(6) =373a(7) =519a(8) =689a(9) =883a(10) =1101a(11) =1343a(12) =1609a(13) =1899a(14) =2213a(15) =2551a(16) =2913a(17) =3299a(18) =3709a(19) =4143a(20) =4601a(21) =5083a(22) =5589a(23) =6119a(24) =6673a(25) =7251a(26) =7853a(27) =8479a(28) =9129a(29) =9803