A091240 Largest GF2X-Matula number i which encodes a tree of n nodes, i.e., for which A091238(i) = n.

1, 2, 4, 11, 47, 319, 3053, 40345

Offset

1,2

Comments

Apparently from n=4 onward given by recurrence a(4) = A014580(4), a(5) = A014580(A014580(4)), a(6) = A014580(A014580(A014580(4))), etc.

Links

Table of n, a(n) for n=1..8.

A. Karttunen, Scheme-program for computing this sequence.

Crossrefs

Analogous to A005518. A091239 gives the smallest i with number of nodes = n. Cf. A091230, A091238, A091241.

Sequence in context: A120259 A174632 A307592 * A068488 A096119 A117157

Adjacent sequences: A091237 A091238 A091239 * A091241 A091242 A091243

Keyword

nonn

Author

Antti Karttunen, Jan 03 2004

Status

approved