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 A175967 #5 Mar 26 2015 12:05:21 %S A175967 1,2,6,12,20,29,39,51,65,80,96,114,134,155,177,201,226,252,279,307, %T A175967 337,369,402,436,471,507,545,584,624,666,710,755,801,849,898,948,999, %U A175967 1051,1105,1160,1216,1273,1331,1391,1453,1516,1580,1645,1711,1779 %N A175967 Lexicographically earliest sequence with first differences as increasing sequence of nonprimes A018252. %C A175967 Complement of A175968. %H A175967 Reinhard Zumkeller, <a href="/A175967/b175967.txt">Table of n, a(n) for n = 1..10000</a> %F A175967 a(n) - a(n-1) = A018252(n-1) for n >= 2. %o A175967 (Haskell) %o A175967 a175967 n = a175967_list !! n %o A175967 a175967_list = scanl (+) 1 a018252_list %o A175967 -- _Reinhard Zumkeller_, Mar 26 2015 %Y A175967 Cf. A175965, A175966, A175968, A014284, A175969, A051349, A175970. %Y A175967 Cf. A018252. %K A175967 nonn %O A175967 1,2 %A A175967 _Jaroslav Krizek_, Oct 31 2010