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 A243902 #9 Jun 15 2014 17:54:11 %S A243902 2,3,4,9,18,45,146,469,1655,6095,23775 %N A243902 Number of pairs of terms of the sequence A237929 less than 10^n. %H A243902 Giovanni Resta, <a href="http://www.numbersaplenty.com/set/eRAP/">eRAPs</a>, the 446139 terms < 10^12. %H A243902 Carlos Rivera, <a href="http://www.primepuzzles.net/puzzles/puzz_719.htm">Extension to Ruth Aaron pairs</a> %Y A243902 Cf. A001414, A006145 Ruth-Aaron numbers (1): sum of prime divisors of n = sum of prime divisors of n+1, A228126 Sum of prime divisors of n (with repetition) is one less than the sum of prime divisors (with repetition) of n+1, A237929 Numbers n such that (i) the sum of prime divisors of n (with repetition) is one less than the sum of prime divisors (with repetition) of n+1, and (ii) n and n+1 have the same number of prime divisors (with repetition). %K A243902 nonn,hard,more %O A243902 1,1 %A A243902 _Abhiram R Devesh_, Jun 14 2014