A080071 - OEIS

%I #5 Jan 11 2024 13:06:46

%S 0,1,2,2,3,2,3,3,3,2,4,2,3,3,3,3,4,3,2,3,4,4,3,3,2,4,2,3,4,3,2,4,3,3,

%T 3,4,3,2,3,4,3,2,3,6,3,3,3,4,3,3,3,3,3,2,4,3,2,4,5,3,2,4,3,2,3,3,4,2,

%U 4,3,2,3,5,2,4,2,6,3,3,3,3,3,2,4,2,3,4,5,5,3,3,2,5,2,5,2,3,4,2,4,3,3,4,3,2

%N Top-level length of each parenthesization/root degree of general trees encoded in A080070.

%F a(n) = A057515(A080068(n))

%Y Cf. A080070, A080090.

%K nonn

%O 0,3

%A _Antti Karttunen_, Jan 27 2003