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 A187907 #14 Sep 09 2018 02:23:25 %S A187907 1,3,5,7,9,11,13,15,16,19,20,23,24,26,28,30,32,34,36,38,40,41,43,46, %T A187907 48,49,51,53,55,57,59,61,63,64,66,68,71,73,74,76,78,80,82,84,86,88,89, %U A187907 91,93,95,97,99,101,103,105,107,109,111,113,114,116,118,120,122,124,126,128,130,132,134,136,138,139,141,143,145,147,149,151,153,155 %N A187907 Rank transform of the sequence floor((4 - sqrt(5))*n); complement of A187908. %C A187907 See A187224. A187232(n) = A187907(n) for n=1..20; A187232(21)=39 and A187907(21)=40. %t A187907 r=4-5^(1/2); %t A187907 seqA = Table[Floor[r*n], {n, 1, 220}] (* A187330 *) %t A187907 seqB = Table[n, {n, 1, 220}]; (* A000027 *) %t A187907 jointRank[{seqA_, %t A187907 seqB_}] := {Flatten@Position[#1, {_, 1}], %t A187907 Flatten@Position[#1, {_, 2}]} &[ %t A187907 Sort@Flatten[{{#1, 1} & /@ seqA, {#1, 2} & /@ seqB}, 1]]; %t A187907 limseqU = %t A187907 FixedPoint[jointRank[{seqA, #1[[1]]}] &, %t A187907 jointRank[{seqA, seqB}]][[1]] (* A187907 *) %t A187907 Complement[Range[Length[seqA]], limseqU] (* A187908 *) %t A187907 (* _Peter J. C. Moses_, Mar 15 2011 *) %o A187907 (Maxima) makelist(floor((4-sqrt(5))*n),n,1,100); /* _Martin Ettl_, Oct 17 2012 */ %Y A187907 Cf. A187224, A187908. %K A187907 nonn %O A187907 1,2 %A A187907 _Clark Kimberling_, Mar 15 2011