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 A292242 #7 Sep 12 2017 20:38:04 %S A292242 0,0,1,0,1,0,2,0,1,0,1,0,1,0,2,0,1,0,3,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0, %T A292242 1,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,4,0,1,0,1,0,1,0,3,0, %U A292242 1,0,1,0,1,0,1,0,1,0,2,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,2,0,1,0,1,0,1,0,2,0,1 %N A292242 Number of trailing 2-digits in ternary representation of A254103(n). %H A292242 Antti Karttunen, <a href="/A292242/b292242.txt">Table of n, a(n) for n = 0..16384</a> %F A292242 a(n) = A007949(1+A254103(n)). %F A292242 a(n) = A007814(1+A291760(n)). %F A292242 a(0) = 0, after which, a(2n) = 1 + A292241(n/2), a(2n+1) = 0. %o A292242 (Scheme) %o A292242 (define (A292242 n) (A007949 (+ 1 (A254103 n)))) %o A292242 (define (A292242 n) (A007814 (+ 1 (A291760 n)))) %o A292242 (define (A292242 n) (cond ((zero? n) n) ((odd? n) 0) (else (+ 1 (A292241 (/ n 2)))))) %Y A292242 Cf. A007814, A007949, A254103, A291760, A292241 (even bisection subtracted by one). %Y A292242 Cf. also A292252, A292262. %K A292242 nonn,base %O A292242 0,7 %A A292242 _Antti Karttunen_, Sep 12 2017