A355909 Number of nodes at level n in the tree T_0 mentioned in A355905.

1, 2, 3, 4, 6, 9, 13, 19, 28, 42, 63, 94, 141, 212, 318, 477, 716, 1074, 1611, 2417, 3626, 5439, 8158, 12237

Offset

0,2

Comments

First differences give A355910.

Links

Table of n, a(n) for n=0..23.

Don Knuth, Ambidextrous Numbers, Preprint, September 2022. See (8.1), w_n.

Formula

a(n) = 1 + (c(n)+c(n-1))/2 where c(n) = |A355908(n)|.

Crossrefs

Cf. A355904-A355908, A355910-A355913.

Sequence in context: A375922 A238434 A061418 * A136423 A215245 A078932

Adjacent sequences: A355906 A355907 A355908 * A355910 A355911 A355912

Keyword

nonn,more

Author

N. J. A. Sloane, Sep 19 2022

Status

approved