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 A175766 #4 Mar 31 2012 21:03:15 %S A175766 5,7,10,13,14,19,20,25,26,28,31,38,39,40,43,50,52,55,56,61,62,69,73, %T A175766 76,78,80,86,91,95,100,103,104,109,110,112,115,119,122,123,124,125, %U A175766 133,138,139,145,146,151,152,156,159,160,172,181,182,187,190,193,199,200,205,206,208 %N A175766 Greater of "twin numbers": Omega(n) = Omega(n - 2^Omega(n)), where Omega is A001222. %C A175766 Generalizes the twin primes. Superset of A006512. %e A175766 "Twin numbers" are (3, 5), (5, 7), (6, 10), (11, 13), (10, 14), (17, 19), (12, 20), (21, 25), (22, 26), (20, 28), (29, 31), (34, 38), (35, 39), (24, 40), (41, 43), (42, 50), (44, 52), (51, 55), (40, 56), (59, 61), (58, 62), (65, 69), (71, 73), ... %o A175766 (PARI) for(n=1,1e3,o=bigomega(n);trap(, ,if(o==bigomega(n-2^o),print1(n",")))) %Y A175766 Cf. A001222, A006512, A175612. %K A175766 nonn %O A175766 1,1 %A A175766 _Juri-Stepan Gerasimov_, Sep 01 2010 %E A175766 Entry rewritten by _Charles R Greathouse IV_, Sep 01 2010