Record values in A091023.

Terms

a(0) =1a(1) =2a(2) =13a(3) =26a(4) =205a(5) =410a(6) =3277a(7) =6554a(8) =52429a(9) =104858a(10) =838861a(11) =1677722a(12) =13421773a(13) =26843546a(14) =214748365a(15) =429496730a(16) =3435973837a(17) =6871947674a(18) =54975581389a(19) =109951162778a(20) =879609302221