Base-10 representation of A261269.

Terms

a(0) =3a(1) =7a(2) =29a(3) =59a(4) =239a(5) =479a(6) =3833a(7) =30671a(8) =61343a(9) =981493a(10) =3925973a(11) =62815573a(12) =502524587a(13) =2010098351a(14) =16080786809