Number of (not necessarily maximal) cliques in the n X n knight graph.

Terms

a(0) =2a(1) =5a(2) =18a(3) =41a(4) =74a(5) =117a(6) =170a(7) =233a(8) =306a(9) =389a(10) =482a(11) =585a(12) =698a(13) =821a(14) =954a(15) =1097a(16) =1250a(17) =1413a(18) =1586a(19) =1769a(20) =1962a(21) =2165a(22) =2378a(23) =2601a(24) =2834a(25) =3077a(26) =3330a(27) =3593a(28) =3866a(29) =4149