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

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =8a(5) =16a(6) =18a(7) =30a(8) =32a(9) =36a(10) =54a(11) =64a(12) =108a(13) =128a(14) =150a(15) =162a(16) =210a(17) =216a(18) =256a(19) =324a(20) =450a(21) =486a(22) =512a(23) =648a(24) =750a(25) =900a(26) =972a(27) =1024a(28) =1296a(29) =1458