a(n) = A000523(A372444(n)); One less than the length of binary expansion of the n-th iterate of 27 with A371094.

A372449

a(n) = A000523(A372444(n)); One less than the length of binary expansion of the n-th iterate of 27 with A371094.

Terms

    a(0) =4a(1) =7a(2) =12a(3) =23a(4) =44a(5) =84a(6) =165a(7) =326a(8) =650a(9) =1297a(10) =2590a(11) =5177a(12) =10349a(13) =20695a(14) =41386a(15) =82766a(16) =165527a(17) =331048a(18) =662093a(19) =1324181a(20) =2648358a(21) =5296712a(22) =10593418a(23) =21186832a(24) =42373658a(25) =84747311a(26) =169494616a(27) =338989224a(28) =677978441a(29) =1355956875

External references