Number of surviving (but not bifurcating) odd nodes at generation n in the binary tree of persistently squarefree numbers (see A293230).

A293519

Number of surviving (but not bifurcating) odd nodes at generation n in the binary tree of persistently squarefree numbers (see A293230).

Terms

    a(0) =0a(1) =0a(2) =0a(3) =1a(4) =1a(5) =0a(6) =2a(7) =3a(8) =2a(9) =3a(10) =3a(11) =8a(12) =10a(13) =11a(14) =17a(15) =20a(16) =31a(17) =38a(18) =46a(19) =67a(20) =90a(21) =116a(22) =160a(23) =220a(24) =280a(25) =397a(26) =509a(27) =685a(28) =927a(29) =1280

External references