a(n) is the number of regions formed by n-secting the angles of a heptagon.

Terms

a(0) =1a(1) =14a(2) =78a(3) =112a(4) =50a(5) =252a(6) =484a(7) =532a(8) =848a(9) =448a(10) =1261a(11) =1316a(12) =1751a(13) =1862a(14) =1590a(15) =2436a(16) =3053a(17) =3136a(18) =3872a(19) =2912a(20) =4607a(21) =4844a(22) =5629a(23) =5824a(24) =5335a(25) =6734a(26) =7813a(27) =7966a(28) =9073a(29) =7056