Tower of Hanoi with 5 pegs.

Terms

a(0) =1a(1) =3a(2) =5a(3) =7a(4) =11a(5) =15a(6) =19a(7) =23a(8) =27a(9) =31a(10) =39a(11) =47a(12) =55a(13) =63a(14) =71a(15) =79a(16) =87a(17) =95a(18) =103a(19) =111a(20) =127a(21) =143a(22) =159a(23) =175a(24) =191a(25) =207a(26) =223a(27) =239a(28) =255a(29) =271