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

1,1

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.

Links

Table of n, a(n) for n=1..43.

Index entries for sequences related to Reverse and Add!

Example

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.

Crossrefs

Cf. A075421, A091675, A075299, A089493.

Sequence in context: A210120 A266308 A278141 * A061662 A348657 A321224

Adjacent sequences: A091673 A091674 A091675 * A091677 A091678 A091679

Keyword

nonn,base

Author

Klaus Brockhaus, Jan 28 2004

Status

approved