cp's OEIS Frontend

A331167 a(n) = min(n, A193231(n)), where A193231(n) is blue code of n.

%I A331167 #13 Dec 10 2020 01:34:24
%S A331167 0,1,2,2,4,4,6,7,8,9,10,11,10,11,9,8,16,16,18,19,20,21,22,22,24,25,26,
%T A331167 27,27,26,24,25,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,34,35,
%U A331167 33,32,39,38,36,37,45,44,46,47,40,41,43,42,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,68,69,71,70,65,64,66,67,75,74,72,73,78,79,77,76
%N A331167 a(n) = min(n, A193231(n)), where A193231(n) is blue code of n.
%C A331167 For all i, j > 0: a(i) = a(j) => A280501(i) = A280501(j).
%H A331167 Antti Karttunen, <a href="/A331167/b331167.txt">Table of n, a(n) for n = 0..16383</a>
%H A331167 Antti Karttunen, <a href="/A331167/a331167.txt">Data supplement: n, a(n) computed for n = 0..65537</a>
%H A331167 <a href="/index/Bi#binary">Index entries for sequences related to binary expansion of n</a>
%H A331167 <a href="/index/Ge#GF2X">Index entries for sequences related to polynomials in ring GF(2)[X]</a>
%F A331167 a(n) = min(n, A193231(n)).
%o A331167 (PARI) A331167(n) = { my(x='x); min(n,subst(lift(Mod(1, 2)*subst(Pol(binary(n), x), x, 1+x)), x, 2)); };
%Y A331167 Cf. A193231, A280501.
%Y A331167 Cf. also A331166.
%K A331167 nonn
%O A331167 0,3
%A A331167 _Antti Karttunen_, Jan 12 2020