Numbers that are primally tight, have 2 as first prime and strictly ascending powers.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =16a(5) =18a(6) =32a(7) =54a(8) =64a(9) =108a(10) =128a(11) =162a(12) =256a(13) =324a(14) =486a(15) =512a(16) =648a(17) =972a(18) =1024a(19) =1458a(20) =1944a(21) =2048a(22) =2250a(23) =2916a(24) =3888a(25) =4096a(26) =4374a(27) =5832a(28) =8192a(29) =8748