Number of terms of A293630 at stage n.

Terms

a(0) =2a(1) =4a(2) =7a(3) =13a(4) =37a(5) =73a(6) =145a(7) =289a(8) =865a(9) =1729a(10) =3457a(11) =10369a(12) =20737a(13) =41473a(14) =82945a(15) =248833a(16) =497665a(17) =995329a(18) =1990657a(19) =3981313a(20) =11943937a(21) =23887873a(22) =47775745a(23) =143327233a(24) =286654465a(25) =573308929a(26) =1146617857a(27) =3439853569a(28) =6879707137a(29) =20639121409