A091676 a(n) = smallest k such that the base 4 Reverse and Add! trajectory of A075421(n) joins the trajectory of k.

266, 3, 719, 795, 799, 269, 258, 286, 4207, 1037, 4236, 4278, 256, 4169, 4182, 4189, 271, 4338, 4402, 4598, 4662, 4108, 312, 5357, 6157, 4104, 4159, 7247, 7295, 7407, 7549, 8063, 4157, 8189, 4141, 12431, 12463, 12539, 15487, 4349, 4239, 7391, 16522

Offset: 1

Author

Klaus Brockhaus, Jan 28 2004

Keywords

• nonn
• base

Comments

a(n) <= A075421(n); a(n) = A075421(n) iff the trajectory of A075421(n) does not join the trajectory of any smaller number, i.e., A075421(n) is also a term of A091675.

a(n) determines a 1-1-mapping from the terms of A075421 to the terms of A091675. For the inverse mapping cf. A091677.

Base-4 analog of A089493.

Examples

			A075421(1) = 290, the trajectory of 290 (A075299) joins the trajectory of 266 = A091675(12) at 4195, so a(1) = 266. A075421(6) = 1210, the trajectory of 1210 joins the trajectory of 269 = A091675(13) at 17975, so a(6) = 269.
		

Links

• Index entries for sequences related to Reverse and Add!

Crossrefs

Cf. A075421, A091675, A075299, A089493.