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 A064290 #16 Jun 26 2023 18:07:20 %S A064290 0,1,3,6,13,20,43,62,113,224,367,494,833,1815,3379,5551,9169,17864, %T A064290 32978,58964,106218,131313,155719,180118,591890,881467,1345004, %U A064290 3012446,5728819,9309579,17512700,25641318,52978675,61998980,125130665,244636214,280766754,566273517,1031389697,2182394227,3045423658,3454917187 %N A064290 First number of height n in Recamán's sequence A005132. %C A064290 The height of a term in A005132 = number of addition steps - number of subtraction steps to reach it (see A064289). %C A064290 Needs a b-file. - _N. J. A. Sloane_, May 01 2020 %H A064290 N. J. A. Sloane, <a href="/A005132/a005132.txt">FORTRAN program for A005132, A057167, A064227, A064228</a> %H A064290 <a href="/index/Rea#Recaman">Index entries for sequences related to Recamán's sequence</a> %e A064290 A005132 begins 0, 1, 3, 6, 2, 7, 13, 20, 12, ... and these terms have heights 0, 1, 2, 3, 2, 3, 4, 5, 4, ... %Y A064290 Cf. A005132, A064288, A064289, A064292, A064293, A064294. %K A064290 nonn %O A064290 1,3 %A A064290 _N. J. A. Sloane_, Sep 25 2001 %E A064290 a(0) = 0 added by _N. J. A. Sloane_, May 01 2020