a(1)=15; for n>1, a(n) = the smallest number k >a(n-1) such that 2*A174214(k)= 3*(k-1).

A174216

a(1)=15; for n>1, a(n) = the smallest number k >a(n-1) such that 2*A174214(k)= 3*(k-1).

Terms

    a(0) =15a(1) =27a(2) =63a(3) =123a(4) =279a(5) =567a(6) =1143a(7) =2307a(8) =4623a(9) =9447a(10) =18927a(11) =38283a(12) =77139a(13) =154839a(14) =309747a(15) =620463a(16) =1241823a(17) =2483847a(18) =4967739a(19) =9935607a(20) =19892547a(21) =39785199

External references