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

Terms

a(0) =7a(1) =15a(2) =84a(3) =85a(4) =42a(5) =190a(6) =490a(7) =442a(8) =854a(9) =358a(10) =1267a(11) =1170a(12) =1757a(13) =1667a(14) =1582a(15) =2220a(16) =3059a(17) =2885a(18) =3878a(19) =2640a(20) =4613a(21) =4523a(22) =5635a(23) =5489a(24) =5327a(25) =6357a(26) =7819a(27) =7554a(28) =9079a(29) =6252