Number of squares on infinite chessboard at n knight's moves from center.

Terms

a(0) =1a(1) =8a(2) =32a(3) =68a(4) =96a(5) =120a(6) =148a(7) =176a(8) =204a(9) =232a(10) =260a(11) =288a(12) =316a(13) =344a(14) =372a(15) =400a(16) =428a(17) =456a(18) =484a(19) =512a(20) =540a(21) =568a(22) =596a(23) =624a(24) =652a(25) =680a(26) =708a(27) =736a(28) =764a(29) =792