Toothpick sequence with toothpicks connected by their endpoints.

Terms

a(0) =0a(1) =1a(2) =7a(3) =23a(4) =39a(5) =79a(6) =95a(7) =135a(8) =175a(9) =287a(10) =303a(11) =343a(12) =383a(13) =495a(14) =535a(15) =647a(16) =759a(17) =1087a(18) =1103a(19) =1143a(20) =1183a(21) =1295a(22) =1335a(23) =1447a(24) =1559a(25) =1887a(26) =1927a(27) =2039a(28) =2151a(29) =2479