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

Author

N. J. A. Sloane, Sep 19 2022

Keywords

• nonn
• more

Comments

First differences give A355910.

Links

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

Crossrefs

Cf. A355904-A355908, A355910-A355913.

Formula

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