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 A186781 #13 Sep 14 2019 14:58:49 %S A186781 18,20,30,34,42,69,152,155,259,287,351,459,513,649,671,871,923,949, %T A186781 1513,1649,1717,1843,1919,1957,2033,2071,2147,2921,3013,3151,4321, %U A186781 4379,4553,4727,4843,4867,5017,5053,5177,5363,5549,5611,7067,7141,7289,7363,7807,8651 %N A186781 Integer solutions x to the equation A064380(x)-A000010(x)=5. %C A186781 The defining equation has infinitely many solutions, see A176472. %D A186781 V. S. Shevelev, Multiplicative functions in the Fermi-Dirac arithmetic, Izvestia Vuzov of the North-Caucasus region, Nature sciences 4 (1996), 28-43. %H A186781 Amiram Eldar, <a href="/A186781/b186781.txt">Table of n, a(n) for n = 1..200</a> %Y A186781 Cf. A000010, A064380, A176472, A176509, A186777, A186778, A186779, A186780. %K A186781 nonn %O A186781 1,1 %A A186781 _Vladimir Shevelev_, Feb 26 2011 %E A186781 More terms from _Amiram Eldar_, Sep 14 2019