cp's OEIS Frontend

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.

A377169 Nonnegative integers containing isolated ones in their binary representation.

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%I A377169 #21 Oct 20 2024 16:22:09
%S A377169 1,2,4,5,8,9,10,11,13,16,17,18,19,20,21,22,23,25,26,29,32,33,34,35,36,
%T A377169 37,38,39,40,41,42,43,44,45,46,47,49,50,52,53,57,58,61,64,65,66,67,68,
%U A377169 69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87
%N A377169 Nonnegative integers containing isolated ones in their binary representation.
%C A377169 A 1 is isolated if it's not adjacent to another 1.
%H A377169 Paolo Xausa, <a href="/A377169/b377169.txt">Table of n, a(n) for n = 1..10000</a>
%e A377169 19 is a term because 19 = 10011_2 contains one isolated 1.
%e A377169 74 is a term because all ones in 74 = 1001010_2 are isolated.
%t A377169 Select[Range[150], MemberQ[Split[IntegerDigits[#, 2]], {1}] &]
%Y A377169 Complement of A144795.
%Y A377169 Cf. A004752, A007088, A377167.
%K A377169 nonn,base,easy
%O A377169 1,2
%A A377169 _Paolo Xausa_, Oct 18 2024