Number of surviving even nodes at generation n in the binary tree of persistently squarefree numbers (see A293230).
A293518
Number of surviving even nodes at generation n in the binary tree of persistently squarefree numbers (see A293230).
Terms
- a(0) =0a(1) =1a(2) =1a(3) =2a(4) =2a(5) =2a(6) =3a(7) =6a(8) =6a(9) =8a(10) =12a(11) =16a(12) =20a(13) =31a(14) =34a(15) =56a(16) =63a(17) =88a(18) =112a(19) =150a(20) =208a(21) =287a(22) =379a(23) =511a(24) =690a(25) =908a(26) =1239a(27) =1637a(28) =2252a(29) =2945
External references
- oeis: A293518