Number of heptagonal regions in regular n-gon with all diagonals drawn.

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =15a(9) =0a(10) =17a(11) =18a(12) =57a(13) =0a(14) =21a(15) =44a(16) =115a(17) =0a(18) =150a(19) =104a(20) =81a(21) =112a(22) =116a(23) =0a(24) =155a(25) =224a(26) =429a(27) =306a(28) =560a(29) =180