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 A097210 #5 Mar 21 2015 04:45:53 %S A097210 1,2,4,8,10,16,32,44,64,128,184,218,256,400,512,752,1024,2048,3040, %T A097210 3392,3748,4096,8192,12224,16384,27904,32768,49024,57856,61064,64594, %U A097210 65536,131072,196352,226304,253808,262144,524288,785920,954368,981520,1048576 %N A097210 Numbers that appear in A076078. %C A097210 A076078(n) = the number of sets of distinct positive integers with a least common multiple of n. %C A097210 All powers of 2 are in the sequence. - _Robert G. Wilson v_, Aug 14 2004 %t A097210 f[n_] := Block[{d = Divisors[n]}, Plus @@ (MoebiusMu[n/d](2^DivisorSigma[0, d] - 1))]; Take[ Union[ Table[ f[n], {n, 2^20}]], 42] (* _Robert G. Wilson v_, Aug 14 2004 *) %Y A097210 Cf. A076078, A097211. %K A097210 nonn %O A097210 1,2 %A A097210 _Matthew Vandermast_, Aug 01 2004