a(n) is the minimal area of a convex lattice polygon with 2n sides.

Terms

a(0) =1a(1) =3a(2) =7a(3) =14a(4) =24a(5) =40a(6) =59a(7) =87a(8) =121a(9) =164a(10) =210a(11) =274a(12) =345a(13) =430a(14) =523a(15) =632a(16) =749a(17) =890a(18) =1039a(19) =1222a(20) =1412a(21) =1620a(22) =1838a(23) =2088a(24) =2357a(25) =2651a(26) =2953a(27) =3278a(28) =3612a(29) =4020