This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A091676 #7 Jul 11 2015 00:50:51 %S A091676 266,3,719,795,799,269,258,286,4207,1037,4236,4278,256,4169,4182,4189, %T A091676 271,4338,4402,4598,4662,4108,312,5357,6157,4104,4159,7247,7295,7407, %U A091676 7549,8063,4157,8189,4141,12431,12463,12539,15487,4349,4239,7391,16522 %N A091676 a(n) = smallest k such that the base 4 Reverse and Add! trajectory of A075421(n) joins the trajectory of k. %C A091676 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. %C A091676 a(n) determines a 1-1-mapping from the terms of A075421 to the terms of A091675. For the inverse mapping cf. A091677. %C A091676 Base-4 analog of A089493. %H A091676 <a href="/index/Res#RAA">Index entries for sequences related to Reverse and Add!</a> %e A091676 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. %Y A091676 Cf. A075421, A091675, A075299, A089493. %K A091676 nonn,base %O A091676 1,1 %A A091676 _Klaus Brockhaus_, Jan 28 2004