Rank of 2^n when all prime powers (A246655) p^n, for n>=1, are jointly ranked.

Terms

a(0) =1a(1) =3a(2) =6a(3) =10a(4) =18a(5) =27a(6) =44a(7) =70a(8) =117a(9) =198a(10) =340a(11) =604a(12) =1078a(13) =1961a(14) =3590a(15) =6635a(16) =12370a(17) =23150a(18) =43579a(19) =82267a(20) =155921a(21) =296347a(22) =564688a(23) =1078555a(24) =2064589a(25) =3958999a(26) =7605134a(27) =14632960a(28) =28195586a(29) =54403835