A337361 Number of elements of size n in the Ulam set in the canonical free group on two starting members, U({0,1}), generated by the two initial members.

0, 2, 2, 4, 8, 12, 26, 36, 98, 124, 274, 512, 1018, 1916, 3812, 7772, 14822, 29368, 58478, 114300, 225166, 441724, 876238, 1717748, 3406884

Offset

0,2

Links

Table of n, a(n) for n=0..24.

Tej Bade, Kelly Cui, Antoine Labelle, and Deyuan Li, Ulam sets in new settings, arXiv:2008.02762 [math.CO], 2020. See also Integers (2020) Vol. 20, #A102.

Crossrefs

Cf. A336528.

Sequence in context: A268691 A102456 A032067 * A153996 A123024 A079092

Adjacent sequences: A337358 A337359 A337360 * A337362 A337363 A337364

Keyword

nonn,word,more

Author

Deyuan Li, Aug 24 2020

Status

approved